I have a Radtreeview that sits inside a RadGrid. For some reason the expand/collapse buttons of the Treeview are not working. I can expand the Treeview initially, however the NodeExpand event never fires.(a postback does occur to the server, and I have several buttons on the node that work also.) Once the node has been expanded, the collapse button stops functioning, and clicking on it does nothing.(no postback to server). I have the ExpandMode set to ServerSide. However, if I change the Expandmode to Clientside it continues to work. I really need the control to work with ExpandMode set to serverside, to reduce the loading for large Tree's