Hovermenu error when gridview in updatepanel is empty

Hi all,

I have a gridview ( no header shown ) in an updatepanel. On the gridview I have a hovermenuextender - on row level, with some user options, which works just fine as long as the gridview is not empty.

BUT when the gridview is empty, the hovermenuextender causes an error on the page. It seems to work just fine, when I move the grid outside of the updatepanel.

Does anyone have a fix to this issue ?

I am using Visual Web developer 2010, ASP.net 4.0 and Ajax as the extender

Regards Jan