Intel IDT Audio on DG965WH

This thing is killing me. I have an Intel DG965WH MB with IDT Audio. Not even sure where to start. The main problem is I can't get it to play 5.1. The Intel Audio Studio lets me selct 5.1, but then the speaker test app only shows 2 speakers, and only 2 speakers play sound. Sometimes the speaker test shows all 5 speakers, but it still only plays thrugh the LF& RF speakers. The frustrating part is sometimes it works but only on certain mediae players. I've messed with this on and off for way too long, usually just getting frustrated and trying again a month or two later. Every time the driver gets updated I get my hopes up, but I'm beginning to think i just need to get a new sound card and disable the on board audio. I feel like I'm missing something obvious at this point.

Using the 6 channel direct setting on Logitech z5500's, but the same thing happens with the SPDIF optical output.
Updated drivers just today from Intel (AUD_allOS_D20001.0x_PV_IDTGUI_v105_Legacy) which were dated April 09
Vista Ultimate 32 bit
Intel DG965WH MB
3GB memory
Galaxy nVidia GeForce 9600GT