Hi, Monitor issue :( with PR

[Softy]

Not sure where to post this ,
I just switched from my 22 inch monitor to my Western house 26 inch hd lcd tv.
Its got a DVI connection that im using. I hooked it up and eveything boots up fine. adjusted a few settings , the TV runs at 60hz but when I look in my video card settings it goes up to 75hz and I have the box checked that says only show what hz the monitor can surrport. 50, 59, 60 , 75 hz.
I ran left for dead 2 and it worked great, so I clicked the icon for PR and nothing, I mean it shows it clicked it a black screen for a sec and back to the desktop. What gives?
any ideas ? my video card is a nvidia g force 9600 gt.