I have a Sapphire 9800 pro. When I hook up the s-video cable to the TV and boot up my computer, I see the picture on my TV no problem, and it logs into windows. But, the size is off. It does that thing where if I move the mouse to the right, the screen scrolls to the right, mouse over to the left, screen scrolls over to the left. Any suggestions on how to fix this? I have messed with every setting I can find.