I am running a Nvidia nForce 2 thingymebob, with an Athlon Xp1800+ processor. My motherboard is all built in with graphics and sound, all Nvidia can't remember the exact model GX something. And i am running Win XP Pro. I have had my surround sound working before, but it stopped and i searched for this problem and have scince been installing various drivers left right and centre trying to solve the problem. At the moment using the Nvidia Mixer and it's speaker wizard i can establish that each individual speaker works fine, and even hear them all working together in a test within the Nvidia mixer, but apart from that i only get sound from the front 3 speakers and sub. The rear speakers don't work at all. Any help is greatly appreciated. Thanks.