Has anyone found a solution to this?
I've had the same exact problem with my 6802i for years. I figured it was because I was running a PIII, 256mb ram, and a geforce fx 5200 and it wasn't powerful enough to display the video. That obviously wasn't the problem because now I have it in a PC exceeding the recommended hardware with AMD 4000+, 1.25 gb DDR400, and geforce 6800gt and it still won't remove the "camera mask". I can see image stills from the cameras in the settings menu(so the card must be working), but they won't show on the main screen. It doesn't matter whether I'm logged in as admin or another user with viewing rights. I hope someone knows how to fix this.