Szego

Hey, I just bought a kickass new system, A7n8x dlx, radeon 9800 pro, gig of ram, athlon 3.2ghz, its awesome, along with my 19 inch monitor, exceot for the fact that i bought the Z640 spakers. You see my onboard sound has is 6 channel. So it has 6 jacks (one of which you cant even plug anything into cuz its too small) and there are only 3 wires to plug the speakers into 6 jacks. As of now one wire worked, the front and the sub but thats it. Any ideas?