I'm using Telerik version 2009.3.1314.35. I'm binding a RadListView control to a List of custom objects using .DataSource and .DataBind(). On submit, when I try to get the key values using item.DataItemIndex it throws a NotImplementedException and the item.DataItem object is null. The strange thing is that the DataKeyValues array is fine and I can get the key value using item.DisplayIndex. Any ideas why I would get this error?