Routing an Audigy with SPDIF

Mastiff

Hi!
As you can see from the impressive number beside my post, I am a total and utter newbie on KX. But I'm no newbie to sound (especially multi-zone sound) and home theater use of computers, or computers generally. A nice guy called Doc Lotus has spoken very favourably about the KX drivers on the Media Center 9 (hence the multi-zone) page, so I thougt it would be interesting to try it. And I have reached my first snag. In my living room I use the Audigy's main channels via SPDIF (Platinum EX, so I take it from the breakout box), and I was wondering if it was possible to use the other zones for something. I tried to route sound to one of my zones (daddy's throne room...) on the back channels on the card, and I only heard that sound, not the sound I'm playing in the living room. But in the living room I heard both the sound from that zone and the sound from the "throne zone" (I like that name!).

Does that mean that it's impossible to use routing and SPDIF together? In that case, the Auidgy is spent, and I have to work on getting this right on the Live! Value in the same computer. That one gave me another problem, I can't seem to get any sound at all in the rear channels. But this is the original Live! Value, which was a four channel card, so this might just be because I haven't done all the settings correctly.

Any suggestions will be received with great appreciation!