I was using RadControls for ASP.NET yet
and i have a directory sructure as MyApplicationRoot\RadControls
well every thing was fine.
RadControls folder don't have a folder called Ajax in it.
But now i use RadControls for ASP.NET AJAX: Ajax
i am now just used an update panel if asp .net Ajax
<radA:RadAjaxPanel ID="RadAjaxPanel2" runat="server" Width="300px" CssClass="c" UseEmbeddedScripts="false" >
but i seeing the error message bellow in browser
RadAjax v1.7.0: You have not copied the RadControls folder to the root folder of your web-application or you have applied an update incorrectly. To resolve the problem, review this link.