[2005] Update panel and gridview problem

I've searched all over the net for a solution to this problem, with no result.

On a webpage, there is an Ajax Update panel. This panel houses a gridview. I have added a button for edit mode, and set the edit item template I want the user to edit.

The problem is that the gridview never goes into edit mode. When I click the button, the UpdateProgress icon starts moving, but the textbox never shows for the field I specified. It's getting pretty frustrating because I have no idea what I'm doing wrong.

Any ideas?

Does the same thing happen if you take the GridView out of the update panel?

What is the UpdateMode property of the UpdaetPanel set to? Is EnableViewState true or false?