I ran through the same problem. Exactly WHAT are you trying to watch on your TV? What operating system are you using? You cannot run two monitors at once, if you're using Windows XP, and will have to get into your display sub-panel. I'll try to walk you through it.
S-Video Cable wont work
I bought an S-Video Cable from Radio Shack to connect my laptop to my Phillips 60 inch analog rear projection tv. I was not able to get a picture on the television. Is it the cable, or is it not possible to connect your tv to your laptop via S-Video Cable?