GridView DataBind() and Ajax in User Control

Question

Hi,

  In my application, I am using Tabcontainer with dynamic tab panels. I put User Control inside the tab panel dynamically. My User Control contains One GridView and few Buttons with hover menu extender. 

    When I created User Control in code behind I Bind Data to GridView. When I bind Data to GridView functionality of ajax fail in all panel except first panel. HoverMenuExtender fail to display hover menu.  When I comment Bind Method of GridView Everything is Working fine. What is relation between Ajax and GridView's Data Bind in User Control.

Any help appreciated....

Regards,

 VIkram