I am using RadTreeView control. After page is postback i am not able to expand and collapse the TreeNodes.
This issue is in FireFox only. It works perfectly fine in IE.
Have you tried subscribing to the OnClientNodeExpanding and OnClientNodeCollapsing events to see if they are actually fired when you view the page in FF after the postback? Also, are you changing anything with the TreeView when you do this postback?