diff --git a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
index 45ea5c51..b86cead6 100644
--- a/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
+++ b/CampusAppWP8/CampusAppWP8/CampusAppWP8.csproj
@@ -483,6 +483,9 @@
   <ItemGroup>
     <Service Include="{508349B6-6B84-4DF5-91F0-309BEEBAD82D}" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Feed\Utility\" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\$(TargetFrameworkIdentifier)\$(TargetFrameworkVersion)\Microsoft.$(TargetFrameworkIdentifier).$(TargetFrameworkVersion).Overrides.targets" />
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\$(TargetFrameworkIdentifier)\$(TargetFrameworkVersion)\Microsoft.$(TargetFrameworkIdentifier).CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
index e2608efa..ff4e256c 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Link/ClubLinkFeed.cs
@@ -62,7 +62,7 @@ namespace CampusAppWP8.Feed.Link
         /// <returns>true, if file is up-to-date, otherwise false</returns>
         private bool CheckIsFileUpToDate(LinkListModel model, FileInfo fileInfo)
         {
-            if (fileInfo == null || !fileInfo.Exists)
+            if (fileInfo == null || !fileInfo.Exists || fileInfo.Length < 1)
             {
                 return false;
             }
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
index 0f988eeb..57e07b05 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Link/CommonLinkFeed.cs
@@ -62,7 +62,7 @@ namespace CampusAppWP8.Feed.Link
         /// <returns>true, if file is up-to-date, otherwise false</returns>
         private bool CheckIsFileUpToDate(LinkListModel model, FileInfo fileInfo)
         {
-            if (fileInfo == null || !fileInfo.Exists)
+            if (fileInfo == null || !fileInfo.Exists || fileInfo.Length < 1)
             {
                 return false;
             }
diff --git a/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
index a4c33940..2fbd42cd 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/Mensa/MensaFeed.cs
@@ -96,7 +96,7 @@ namespace CampusAppWP8.Feed.Mensa
         /// <returns>true, if file is up-to-date, otherwise false</returns>
         private bool CheckIsFileUpToDate(MenuWeekModel model, FileInfo fileInfo)
         {
-            if (fileInfo == null || !fileInfo.Exists)
+            if (fileInfo == null || !fileInfo.Exists || fileInfo.Length < 1)
             {
                 return false;
             }
diff --git a/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs b/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
index 9db17651..c381f65f 100644
--- a/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
+++ b/CampusAppWP8/CampusAppWP8/Feed/StudentCouncil/StudentCouncilFeed.cs
@@ -62,7 +62,7 @@ namespace CampusAppWP8.Feed.StudentCouncil
         /// <returns>true, if file is up-to-date, otherwise false</returns>
         private bool CheckIsFileUpToDate(StudentCouncilListModel model, FileInfo fileInfo)
         {
-            if (fileInfo == null || !fileInfo.Exists)
+            if (fileInfo == null || !fileInfo.Exists || fileInfo.Length < 1)
             {
                 return false;
             }
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
index 3e54758a..de83647e 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Departments/DepartmentIndexPage.xaml.cs
@@ -15,6 +15,7 @@ namespace CampusAppWP8.Pages.Departments
     using CampusAppWP8.Resources;
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// Page with a list of the faculties.
@@ -48,7 +49,8 @@ namespace CampusAppWP8.Pages.Departments
             DepartmentIndexPage.feed.OnLoaded += new DepartmentFeed.OnIO(this.SetupFacultyList);
             DepartmentIndexPage.feed.OnFailedWeb += new DepartmentFeed.OnFailed(this.FeedIsFailedWeb);
             DepartmentIndexPage.feed.OnFailedFile += new DepartmentFeed.OnFailed(this.FeedIsFailedFile);
-            DepartmentIndexPage.feed.LoadData();
+
+            DepartmentIndexPage.feed.LoadData(Utilities.getLoadModus<Model.Departments.DepartmentModel>());
         
             if (DepartmentIndexPage.favorite == null)
             {
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Events/EventIndexPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Events/EventIndexPage.xaml.cs
index bb9f2dc7..be2584e2 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Events/EventIndexPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Events/EventIndexPage.xaml.cs
@@ -12,6 +12,7 @@ namespace CampusAppWP8.Pages.Events
     using System.Windows.Navigation;
     using CampusAppWP8.Feed.Events;
     using CampusAppWP8.Resources;
+    using CampusAppWP8.Utility;
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
     using Microsoft.Phone.Shell;
@@ -48,7 +49,7 @@ namespace CampusAppWP8.Pages.Events
             EventIndexPage.eventFeed.OnLoaded += new EventFeed.OnIO(this.SetupEventPageList);
             EventIndexPage.eventFeed.OnFailedWeb += new EventFeed.OnFailed(this.FeedIsFailedWeb);
             EventIndexPage.eventFeed.OnFailedFile += new EventFeed.OnFailed(this.FeedIsFailedFile);
-            EventIndexPage.eventFeed.LoadData();
+            EventIndexPage.eventFeed.LoadData(Utilities.getLoadModus<Model.RSS.RSSViewModel>());
         }
 
         /// <summary>
@@ -88,6 +89,21 @@ namespace CampusAppWP8.Pages.Events
             base.OnNavigatedTo(e);
         }
 
+        /// <summary>
+        /// Methods overrides the  OnNavigatedFrom-Method
+        /// </summary>
+        /// <param name="e">some NavigationEventArgs</param>
+        protected override void OnNavigatedFrom(NavigationEventArgs e)
+        {
+            if (NavigationMode.Back == e.NavigationMode)
+            {
+                // delete all models
+                EventIndexPage.eventFeed.SaveData();
+            }
+
+            base.OnNavigatedFrom(e);
+        }
+
         /// <summary>
         /// Is called after the RSS feeds are loaded into the eventFeed model. 
         /// If there was no feed information set to the UI, the feed list 
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Lecture/LecturePage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Lecture/LecturePage.xaml.cs
index a29a037d..df00699e 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Lecture/LecturePage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Lecture/LecturePage.xaml.cs
@@ -63,6 +63,7 @@ namespace CampusAppWP8.Pages.Lecture
         #region methods
 
         #region protected
+        
         /// <summary>
         /// Methods overrides the  OnNavigatedFrom-Method
         /// </summary>
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
index 30ff8fa0..4cac9c3a 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Links/LinkPage.xaml.cs
@@ -14,6 +14,7 @@ namespace CampusAppWP8.Pages.Links
     using CampusAppWP8.Resources;
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// Class for the LinkPage
@@ -66,8 +67,8 @@ namespace CampusAppWP8.Pages.Links
             this.InitializeFeeds();
             this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
             this.loadingFeeds = 2;
-            this.commonLinkFeed.LoadData();
-            this.clubLinkFeed.LoadData();
+            this.commonLinkFeed.LoadData(Utilities.getLoadModus<Model.Link.LinkListModel>());
+            this.clubLinkFeed.LoadData(Utilities.getLoadModus<Model.Link.LinkListModel>());
         }
 
         /// <summary>
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
index ffb6d246..228ffcb9 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Mensa/MensaPage.xaml.cs
@@ -17,6 +17,7 @@ namespace CampusAppWP8.Pages.Mensa
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
     using Microsoft.Phone.Shell;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// Class for the MensaPage
@@ -176,7 +177,7 @@ namespace CampusAppWP8.Pages.Mensa
             }
             else
             {
-                this.feed.LoadData();
+                this.feed.LoadData(Utilities.getLoadModus<Model.Mensa.MenuWeekModel>());
             }
         }
 
diff --git a/CampusAppWP8/CampusAppWP8/Pages/News/NewsIndexPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/News/NewsIndexPage.xaml.cs
index 7a8b5e57..b48619c2 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/News/NewsIndexPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/News/NewsIndexPage.xaml.cs
@@ -15,6 +15,7 @@ namespace CampusAppWP8.Pages.News
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
     using Microsoft.Phone.Shell;
+    using CampusAppWP8.Utility;
     
     /// <summary>
     /// Overview page of all news.
@@ -48,7 +49,7 @@ namespace CampusAppWP8.Pages.News
             NewsIndexPage.newsFeed.OnLoaded += new NewsFeed.OnIO(this.SetupNewsPageList);
             NewsIndexPage.newsFeed.OnFailedWeb += new NewsFeed.OnFailed(this.FeedIsFailWeb);
             NewsIndexPage.newsFeed.OnFailedFile += new NewsFeed.OnFailed(this.FeedIsFailFile);
-            NewsIndexPage.newsFeed.LoadData();
+            NewsIndexPage.newsFeed.LoadData(Utilities.getLoadModus<Model.RSS.RSSViewModel>());
         }
 
         /// <summary>
@@ -88,6 +89,20 @@ namespace CampusAppWP8.Pages.News
             base.OnNavigatedTo(e);
         }
 
+        /// <summary>
+        /// Methods overrides the  OnNavigatedFrom-Method
+        /// </summary>
+        /// <param name="e">some NavigationEventArgs</param>
+        protected override void OnNavigatedFrom(NavigationEventArgs e)
+        {
+            if (NavigationMode.Back == e.NavigationMode)
+            {
+                // delete all models
+                NewsIndexPage.newsFeed.SaveData();
+            }
+
+            base.OnNavigatedFrom(e);
+        }
         /// <summary>
         /// Is called after the RSS feeds are loaded into the newsFeed model. 
         /// If there was no feed information set to the UI, the feed list 
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
index 16d28f4a..ab256c91 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
@@ -15,6 +15,7 @@ namespace CampusAppWP8.Pages.Openinghours
     using CampusAppWP8.Resources;
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// Opening hours page.
@@ -51,7 +52,7 @@ namespace CampusAppWP8.Pages.Openinghours
                 this.feed.OnLoaded += new OpeninghoursFeed.OnIO(this.FeedIsReady);
                 this.feed.OnFailedWeb += new OpeninghoursFeed.OnFailed(this.FeedIsFailedWeb);
                 this.feed.OnFailedFile += new OpeninghoursFeed.OnFailed(this.FeedIsFailedFile);
-                this.feed.LoadData();
+                this.feed.LoadData(Utilities.getLoadModus<Model.Openinghours.OpeninghoursModel>());
             }
 
             this.isNewInstance = true;
diff --git a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
index 2e548d4f..63523e6f 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/StudentCouncil/StudentCouncilPage.xaml.cs
@@ -14,6 +14,7 @@ namespace CampusAppWP8.Pages.StudentCouncil
     using CampusAppWP8.Resources;
     using CampusAppWP8.Utility.Lui.MessageBoxes;
     using Microsoft.Phone.Controls;
+    using CampusAppWP8.Utility;
 
     /// <summary>
     /// Class for the  StudentCouncilPage
@@ -59,7 +60,7 @@ namespace CampusAppWP8.Pages.StudentCouncil
             }
 
             this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
-            this.feed.LoadData();
+            this.feed.LoadData(Utilities.getLoadModus<Model.StudentCouncil.StudentCouncilListModel>());
         }
 
         /// <summary>
diff --git a/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs b/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
index 8cb44876..b5543dd9 100644
--- a/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
+++ b/CampusAppWP8/CampusAppWP8/Utility/Utilities.cs
@@ -322,5 +322,21 @@ namespace CampusAppWP8.Utility
             }
             return false;
         }
+
+        /// <summary>Gets load modus. Is check if the only Wifi option is active</summary>
+        /// <remarks>Stubbfel, 27.08.2013.</remarks>
+        /// <typeparam name="T">Generic type parameter.</typeparam>
+        /// <returns>The load modus&lt; t&gt;</returns>
+        public static MainModel<T>.ForceType getLoadModus<T>()
+        {
+            if (Settings.AppSetting.OnlyWifi && !Settings.AppSetting.WifiEnable)
+            {
+                return MainModel<T>.ForceType.FORCE_FILE;
+            }
+            else
+            {
+                return MainModel<T>.ForceType.INVALID;
+            }
+        }
     }
 }
\ No newline at end of file