No sound error in Multiplayer for Return to Castle Wolfenstein Platinum Edition

So I recently found this game while I was helping my dad clear out the shed and we found this and a couple other games.
Singleplayer runs fine(I've only played till the menu so I'll edit when I've played through a couple levels.), but multi gives me a error about sound.
While installing it, it said that Something went wrong but I choose that it installed perfectly because I've had that error so that might have something to do with it.
How should I fix this, reinstall or what?
Post Merge: [time]1325546360[/time]
Yeah its just multi-player, how should I fix it?
Post Merge: [time]1325555829[/time]
NVM had to insert disc 2 for multi, close and or delete thread please