Using S-Video w/ the Mini DVI to Video Adapter

I just purchased a MacBook last week and I also purchased a Mini DVI to Video adapter for it so I can use the built-in DVD player to watch movies on my TV. I have a composite to composite cable and that worked fine when I connected the cable between the Mini DVI to Video Adapter and my TV. However, when I tried to use a S-Video cable and connected that between the Mini DVI to Video Adapter and my TV; then I got no picture at all. All I saw on the TV was a picture of the MAC desktop w/o the dock and the movie or nothing else played at all.

Is the composite connection a better connection for the MAC, or, are there some settings I need to work with on the MAC to get the S-Video connection to work?