Sound card specs! arg how daft of me. yeah there's a 98% chance that's what's wrong. I'm using a good old gravis analog in the port off my soundcard, but I didn't stop to think that I'd need to setup my sound card. it's a soundblaster 16 [the one part of my pc that's been the same on all my comps since, well the internal pc speaker].
I got some strange error when I first tried to get it to work, and I had just given up, guess I'll have to give it another whirl. Thanks Saturnyne.