How can i rebind/ refill Treeview?, i used ASTreeView Control

See more:

C#

ASP.NET

Hai,
In my app i am using ASTreeView control,
I am adding Folders and Files successfully, after adding Folders when i cilcked on that new Folders the event "OnSelectedNodeChanged" is not fired.
How i can solve this prob?
How i recall the treeview ? the following method is used to fill a tree,
How i can recall this method?

protected override void Render(HtmlTextWriter writer)

if u know help me immediately..