jQuery AutoComplete not working inside ASP.Net UpdatePanel

i have used autocomplete as explained in below link

http://www.aspforums.net/Threads/818516/Problem-in-textbox-textchanged-event-with-jquery-autocomplete-textbox/?p=1#Replies

now problem is that my textbox and button is in updatepanel... ao it is not firing button event... i tried lot not getting... pls help me......