Mic not working on SB45s

[The King of Pants]

I had to reinstall the drivers for my on board sound the other day and afterward my mic doesn't seem to be working at all. No power, no nothing. I've got an nForce 4 Ultra Board with on board AC97 that's worked fine for the last 2+ years. I checked my jacks and everything is connected correctly, Could the be a software conflickt between the nForce drivers and Realtek? Not sure what to try now, I get sound just fine through the cans but the mic seems to be dead.

MSI neo4 Plat w/onboard sound
WinXP SP2
Koss SB45s