使用ajax的用户控件无法使用ajax加载智能部件

I have a user control with some ajax functionality. I am using smart part with ajax to load user control. I have put this user control in my virtual directory i.e(C:\Inetpub\wwwroot\wss\VirtualDirectories23\UserControls). But while loading it is giving me an error as follows I have a user control with some ajax functional