Sager 5796 Notebook - Using a TV as a monitor with HDMI

[tman000]

Ok here's the problem

I have a 42in Vizio LCD TV

I also have a Sager 5796 Notebook w/ Vista 64bit

I was using a DVI -> HDMI cable so that I could use my TV as an external monitor. The Video came in fine on my TV (It recognized the signal on my HDMI channel 2 [TV]). The 3.5mm RCA audio cord was connected to my laptop and my TV, however the Audio still came out my notebook speakers and not my TV speakers. On a much older desktop the RCA audio cord worked.

I opted to go out and buy an HDMI Cable today to "fix" the problem since HDMI supports Video and Audio. I hook up the cable to my notebook and my TV. It doesn't recognize the signal at all.

Is there anything I have to do in control panel or some other option so my TV is recognized as an external monitor with an HDMI Connection? If so, what?

 

[tman000]

If anyone has any idea I would appreciate it

I would like to add that my graphics card is an nvidia 9800 gtx if that helps at all