realtek ALC650 5.1 via coax spdif not working...

[gloval]

i have a motherboard with the realtek alc650 audio chipset (shuttle an35n ultra to be exact). i also have the spdif digital output card for it, and it's hooked up to my digital 5.1 receiver via coax.

my problem is that i'm having trouble getting it to work in 6-channel mode via spdif. it does stereo fine via spdif, and it does surround fine via the onboard analog outputs (so i assume the hardware supports 6-channel).

i have the latest drivers from realtek's site installed, and i have speakers set to 6-channel mode, but no dice.

any recommendations??

 

[sprockkets]

If it works via optical but not Coax then that's a hardware bracket problem, with my Asus A7N266-WM in Windows both work fine. I use the Coax cuz my Shuttle ss40 uses the optical input on my Sony receiver.