Hi guys, I'm having some trouble with my new all-in-wonder hd graphics card with on-board hd tv tuner.

I'm trying to play my tv through the tuner using a HDMI cable that connects to my RCA 40" HDTV and to the tuner itself.
But when I plug it in and run the Catalyst Media Center, my tv isn't recognized, help me please. I tried setting it up as digital antenna,
but its not working. Any suggestions?

 I'm running a Dell Inspirion 531 with vista home premium 32-bit.