Lost AC3 passthrough on K8NGM2 (1 Viewer)

[Topher5000]

MediaPortal Version: 0.2.2.0
MediaPortal Skin: Blue Two
Windows Version: Windows XP (SP2)
CPU Type: AMD Athlon 64 3000+
HDD: WD 320gb + WD 500gb
Memory: 895mb
Motherboard: MS-7207PV (MSI) K8NGM2
Motherboard Chipset:
Motherboard Bios:
Video Card:
Video Card Driver:
Sound Card: Realtek High Definition Audio
Sound Card AC3: coaxial out
Sound Card Driver:
1. TV Card: Hauppauge
1. TV Card Type: PVR-150MCE
1. TV Card Driver: 2.0.43.24054
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote: MCE
TV: Hitachi PJ-TX100
TV - HTPC Connection: HDMI

I added a new hd to my htpc & partitioned the the original one, & now I don't get AC3 passthrough. I'm using the on-board sound of my MSI K8NGM2 mobo.
When I first built it, passthrough worked right away. I've checked the Realtek settings, checked AC3Filter & reinstalled the Realtek drivers, but to no avail.
My receiver sees the sound since the front panel shows icons for all channels, but there's no volume. On the htpc's volume control, the spdif control is greyed out.
I'm at a loss. Any help would be much appreciated.

 

[Topher5000]

Fixed it. I was using an expensive rca cable from Future Shop to go from the computer to receiver. I tried another cable from a dollar store & now it works. Go figure.