Right audio channel not working after video card install

I've just installed a e-GeForce FX 5200 in my computer. Previously, I was running my video from the on-board nForce2 chipset. I am also running my audio from the nForce2 chipset. Everything was working fine until I installed the video card and updated the display drivers. When I noticed the right channel not working I uninstalled the audio drivers and installed an updated version, to no avail. I tried a different set of speakers, yet had the same problem. I'm about at the end of my rope here; anyone know what could be wrong with this PoS?
 
Believe me, I checked all of that. I've even gone as far now to remove the video card and revert back to the on board video, still, to no avail.
 
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