Well, for one thing, the S-video output does not carry audio only video.

Thanks for the info, what can i do to hear sound through my TV
any tips on this?

That kind of depends on your TV. If your TV has inputs for Sound, you would come out through your sound card on your computer and into the inputs on your TV. If your TV has no sound inputs, you could get a small (or big) amplifier with speakers and go out of your sound card into the Amplifier (good excuse, however, to buy a surround sound tuner with 5.1 or 6.1 sound dispersement). Or, if you have a VCR, and the VCR had both S-video and RCA sound inputs, you could go from you computer's video card and sound card to the VCR, setting the VCR up to receive input through S-video and have the VCR when turned on to pipe the audio and sound signal to the TV which should come through the TV's speaker - if all you have as input on the TV is coaxial cable. My guess is that since your TV has S-video input, it also has speaker inputs. As to which of the sound outputs on the sound card should be used varies from card to card. Most will have a non-amplified output. This is the one you normally use. You will have to get the proper jack on the computer side that when stuck in separates the right and left channel and on the TV side the two jacks are usually RCA left and right.

Forgot to mention. Some of these video cards do have sound output in the form of a funny European plug that Norelco pioneered. It is multipinned and in your box you may find either that input with two wires coming out with RCA inputs or a little Y adaptor with said imputs. This kind of setup may only be with video turner cards, but yours could possibly have it also.

Thanks for the tip buddy