check here...

Hi,

here is the nice article which gives you the idea for hwo using ajax post back in rad grid...

http://www.telerik.com/help/aspnet/grid/grdmakepostbackajaxrequestfromusercontrolwebformmasterpage.html

better you can approach telerik forum, because you can get help from the developers of this controls...

http://www.telerik.com/community/forums/default.aspx