diff --git a/CampusAppWP8/CampusAppWP8/Model/MainModel.cs b/CampusAppWP8/CampusAppWP8/Model/MainModel.cs
index b36d20e2..9e5f85af 100644
--- a/CampusAppWP8/CampusAppWP8/Model/MainModel.cs
+++ b/CampusAppWP8/CampusAppWP8/Model/MainModel.cs
@@ -313,10 +313,13 @@ namespace CampusAppWP8
         /// <summary>
         /// Save the model data if necessary.
         /// </summary>
-        public void SaveData()
+        /// <param name="force">force saving. DEFAULT: false</param>
+        public void SaveData(bool force = false)
         {
             if ((this.file != null)
-            && ((this.isFileUpToDateOnSave == null) || (this.isFileUpToDateOnSave(this.model, this.file.GetFileInfo()) == false)))
+            && ((this.isFileUpToDateOnSave == null) 
+                || (this.isFileUpToDateOnSave(this.model, this.file.GetFileInfo()) == false) 
+                || (force == true)))
             {
                 if (this.onSaving != null)
                 {
@@ -324,6 +327,7 @@ namespace CampusAppWP8
                 }
 
                 byte[] data = this.SerializeModel();
+                string test = Encoding.UTF8.GetString(data, 0, data.Length);
                 this.file.WriteFile(data);
 
                 if (this.onSaved != null)
diff --git a/CampusAppWP8/CampusAppWP8/Model/Openinghours/OpeninghoursModel.cs b/CampusAppWP8/CampusAppWP8/Model/Openinghours/OpeninghoursModel.cs
index 77d3a16a..530d9220 100644
--- a/CampusAppWP8/CampusAppWP8/Model/Openinghours/OpeninghoursModel.cs
+++ b/CampusAppWP8/CampusAppWP8/Model/Openinghours/OpeninghoursModel.cs
@@ -28,9 +28,7 @@ namespace CampusAppWP8.Model.Openinghours
         /// <summary>
         /// Gets or sets feed information item list.
         /// </summary>
-        [XmlArray("data")]
-        [XmlArrayItem("institution")]
-        public ObservableCollection<OpeninghoursInstitutionModel> institutions { get; set; }
+        private ObservableCollection<OpeninghoursInstitutionModel> institutions;
 
         #endregion
 
@@ -41,6 +39,7 @@ namespace CampusAppWP8.Model.Openinghours
         /// </summary>
         public OpeninghoursModel()
         {
+            this.institutions = new ObservableCollection<OpeninghoursInstitutionModel>();
             this.createTime = DateTime.Now;
         }
 
@@ -62,18 +61,21 @@ namespace CampusAppWP8.Model.Openinghours
         /// <summary>
         /// Gets the Institutions.
         /// </summary>
+        [XmlArray("data")]
+        [XmlArrayItem("institution")]
         public ObservableCollection<OpeninghoursInstitutionModel> Institutions
         {
             get
             {
                 return this.institutions;
             }
+
+            set
+            {
+                this.institutions = value;
+            }
         }
 
         #endregion
-
-        #region Method
-
-        #endregion
     }
 }
diff --git a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
index 48da50e3..b16206ed 100644
--- a/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
+++ b/CampusAppWP8/CampusAppWP8/Pages/Openinghours/OpeninghoursPage.xaml.cs
@@ -34,7 +34,13 @@ namespace CampusAppWP8.Pages.Openinghours
         public OpeninghoursPage()
         {
             this.InitializeComponent();
-            this.InitializeFeed();
+
+            if (this.feed == null)
+            {
+                this.feed = new OpeninghoursFeed();
+                this.feed.onLoaded += new OpeninghoursFeed.OnLoaded(this.FeedIsReady);
+                this.feed.LoadData();
+            }
         }
 
         #endregion
@@ -50,17 +56,12 @@ namespace CampusAppWP8.Pages.Openinghours
         protected override void OnNavigatedTo(NavigationEventArgs e)
         {
             base.OnNavigatedTo(e);
-            if (this.feed == null)
-            {
-                this.InitializeFeed();
-            }
-
+        /*    
             if (e.NavigationMode != System.Windows.Navigation.NavigationMode.Back)
             {
                 this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
             }
-
-            this.feed.LoadData();
+            */
         }
 
         /// <summary>
@@ -77,22 +78,14 @@ namespace CampusAppWP8.Pages.Openinghours
 
         #region private
 
-        /// <summary>
-        /// Initialize the opening hours feed.
-        /// </summary>
-        private void InitializeFeed()
-        {
-            this.feed = new OpeninghoursFeed();
-            this.feed.onLoaded += new OpeninghoursFeed.OnLoaded(this.FeedIsReady);
-        }
-
         /// <summary>
         /// Will be execute if the feed is ready.
         /// </summary>
         private void FeedIsReady()
         {
             this.SetupInstitutionList();
-            this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+            //this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
+            //this.feed.SaveData(true);
         }
 
         /// <summary>
@@ -111,7 +104,7 @@ namespace CampusAppWP8.Pages.Openinghours
         /// <param name="e">event args</param>
         private void OpenHoursForceUpdate_Click(object sender, EventArgs e)
         {
-            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
+            //this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
             this.feed.ForceWebUpdate();
         }
         // private