Update panels don't work after converting from VS 2005 to VS 2008

I've updated to the latest version of the AjaxControlToolkit, but it still doesn't seem to work. UpdatePanel for example works the first time, but it never h开发者_如何学Pythonits my endrequesthandler.

I have experienced a similar problem. I have replaced scriptManager elements in the page with ToolKitScriptManager and it got working. ToolkitScriptManager can be found in ajax dll. If you havent imported ajax dll upto now there is a step by step explanation here http://dotnetguts.blogspot.com/2008/06/ajax-control-toolkit-vsnet-2008.html

Hope it helps