Hi When I use the RadSessionPageStateCompression in the browser file I get the following

Exception type: FormatException

Exception message: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters.

at System.Convert.FromBase64String(String s)

at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)

at Telerik.Web.UI.RadSessionPageStatePersister.Load()

at System.Web.UI.Page.LoadPageStateFromPersistenceMedium()

at System.Web.UI.Page.LoadAllState()

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

If I use the  Telerik.Web.UI.RadHiddenFieldPageStateCompression then it works fine.

• The user right-clicks a node to launch a context menu
• The user selects "Reorder subordinates" from the context menu
• A RadWindow launches a "dialog box" that contains and unordered list of the children of the clicked item. Each list item has a check box next to it. The user can select the children they want to re-order and use "Up" and "Down" buttons to move them up and down the list. When the user clicks "Commit Changes" button, a comma seperated list of the items, in their new order is returned to the parent page, which does an AJAX callback to the database and updates the order of the children.
• On the client side (javascript), after the AJAX callback, the following code runs, and updates the parent node in the treeview:
  //get the treeview, and get the node
  treeview.trackChanges();
  node.collapse();
  node.get_nodes().clear();
  node.set_expandMode(Telerik.Web.UI.TreeNodeExpandMode.WebService);
  node.expand();
  treeview.commitChanges();