+1  A: 

It might be a z-order issue. Can you post a screenshot to make it easier to understand. Also please post the high level HTML you are using on the aspx page.

Ron Harlev
updated with screenshot.
Mark Redman
ok, to solve the issue I needed to add "position:absolute; top:0px" to the .ui-widget-overlay class used by the jQuery UI Dialog. I was concentrating on the div that held the contents. Although your tips didnt give the exact answer, it certainly pointed me in the right direction. Thanks!
Mark Redman
Do i remove the screenshot now? in case it gets deleted by the free hoster?
Mark Redman