dragdrop error

[deepak]

hi all
I have multiple pane in a rad group. in one of then i have enabled drag and drop functionality. i have also set
 RadDragAndDropManager.EnableNativeDrag = true;
now in another pane i have a numericupdown. if i select the text in it and try to drag it, it is drag able and it gives the following error.

   at Telerik.Windows.Controls.DragDrop.DesktopDragDropProvider.OnElementDragLeave(Object sender, DragEventArgs e) in c:\TB\102\WPF_Scrum\Release_WPF_40\Sources\Development\Core\Controls\DragDrop\DragProviders\DesktopDragDropProvider.cs:line 704
   at System.Windows.DragEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
   at System.Windows.OleDropTarget.RaiseDragEvent(RoutedEvent dragEvent, Int32 dragDropKeyStates, Int32& effects, DependencyObject target, Point targetPoint)
   at System.Windows.OleDropTarget.MS.Win32.UnsafeNativeMethods.IOleDropTarget.OleDragOver(Int32 dragDropKeyStates, Int64 point, Int32& effects)

Thanks
Deepak