Big Screen TV Help Please

Hello,I have relocated my simulator to a new room. The room gives me access (while I did not plan this) to a Large screen HD TV (Mitsubishi Medallion HD1080) that has DVI input. I tested my system with the DVI and TV and ran into the following :The NVidia 4200 adapter that I use works great with my displays (Samsung 912 and a Samsung 172N). Whan I hook up the TV I can only get the lowest resolution (800x600). Nothing else is available, I use XP and am wondering - is this a plug and play issue (using the TV as a monitor)? The adapter gives me much higer resolutions with my displays.I'm not real sharp here!!!! Any help would be appreciated.Thanks in advance,Ron [email protected] KCHS