Hi, all.
I'm having trouble getting audio over a DVI-to-HDMI connection out of my video card. The video card supports audio over DVI by way of a 2-pin cable connecting the S/PDIF header on the motherboard to the video card.
The motherboard is an Asus P5N7A-VM. The video card is a BFG Nvidia GeForce 9500 GT. I have disabled the onboard video card. Yes, I know the motherboard has and HDMI out, but I've had other issues with that and I'd prefer to get the video card working the way I would like.
I have connected the 2-pin cable that connects the motherboard to the video card via the two pins on the S/PDIF header. I have the DVI-to-HDMI adapter shown in the image. 
The video portion of the signal is working great. I'm just not getting any audio. In Windows, under audio devices, I see 'Nvidia HDMI out' but it is disabled (grayed out). I'm not sure if this is related the external video card or the Nvidia components on the motherboard though, so this may be moot. I've updated the video card drivers, including completely removing them and reinstalling. I've tried toggling the audio setting in BIOS that switches between S/PDIF OUT or HDMI OUT for the S/PDIF header on the motherboard without success. I've tried toggling the front panel audio settings (I was confident this would have no effect though) to AC97 or (whatever it said) without success.
Is there something I'm missing, or something else that should I try? Is this a lost cause? Thanks in advance.
-Dave