Connecting Xi-Fi Xtreme Audio coaxially in Vista?

[bobboberts]

I have the PCI Xtreme Audio card that I want to connect via co-axial to my speakers, but I don't seem to be having much luck. This worked previously on my XP-based system, as there was an option to pass-through the sound to my decoder, but I can't find any option under Vista, so I can't hear a thing currently.

I've tried playing with any settings I can find, but nothing doing. Anybody know what the heck I'm supposed to do? It's the last thing I need to complete my system build!