Could anyone pls help me..

I migrated from ASP.NET 2.0 Beta to ASP.NET 2.0, then it required me to add GetCallbackResult( ) for my Call back event.
So I adjust my code in RaiseCallbackEvent( ) that is no longer can return a value.
As the result, the page runs much slower and I got this warning from Internet Explorer "A script on this page is causing Internet Explorer to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?"

How should I change my code so the page will run as before?
Thanks so much in advance...