"we can't find your HD audio device" help

hi guys, i just purchased an asus v2-m3n8200 barebones system with an AMD athlon 7750 duel core cpu and installed 2 gigs of high performance DDR2 ram, my old 120gig maxtor HDD, and cd and dvd burners. Upon copleteing the hookup an installing th drivers froth DVD that came with the MB i keep getting an error that simply says "we can't find your HD audo device", although the video works fine via HDMI or VGA. i cannot find an option in the bios to enable hd audio, i have searched every corner of it, and my device manager says i have my audio codecs and legacy audio drivers installed correctly and functioning properly. i have an unknown PCI device which i believe is the problem but it is not compatible with any of the drivers i got from www.usa.asus.com nor the drivers from the installation disc. I have tried every possible solution i could think of and still have my back up against a wall, any help would be appreciated.

 

I have the same system but the V3-M3n8200, and the AMD 7750 processor but no display, did you have to upgrade the bios first?