No sound with SPDIF, all cables working!

First of all I want to say thanx to all the people that helps in this forum :)

I have a X-Fi XtremeGamer in Vista Ultimate. I get no sound from it. I know all the cables are working, I have tested them from my other computer with a X-Fi Platina running on XP. Vista says the card is working and Ive tried connecting a set of headphones and chose speaker output instead of SDPIF and it works.

Anyone know any solution to this?