how to connect laptop to cheap surround sound/home theater system?

i have a toshiba satellite latop, that has an S-Video connect. my cheap dvd player/surround sound/home theater system has an S-Video connect as well. the dvd player "thing" has the connection on the back. the player connects to a 1-piece amp/sub through six plugs and connects to 5 speakers through plugs off of the amp/sub. but there is no screen on the dvd player to figure how to play the music coming from the laptop. im trying to avoid connecting the system to a tv, and going that route, just trying to play music from my laptop through my surround sround system. i have the s-video cord and misc a/v cords, but connecting the two electronics through just the s-video cord does nothing, music plays through the laptop speakers still, and not through the surround sound system.

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