It should work, but you may not have all the software properly configured (I assume you're using the laptop for a DVD transport?) Don't forget, the S cable is video only, so you'll have to get the audio from the laptop to the TV using an audio cable w/ a minijack on one end and RCAs on the TV end.
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?