Dual Monitor and Beyond TV

[Capt Caveman]

Installed a tv tuner card and Beyond TV. I have a dual monitor set-up and when I drag the Beyond TV window to my secondary window, the picture goes blank in the window. The picture comes back when I drag the window back to my primary monitor.

Is it an issue with my tv tuner card (ATI Theater 550 Pro), Beyond TV or my 8800GT?

Thanks for any assistance.