i bought an a7v133 and it has onboard sound...but it doesn't work at all. i'm guessing it's supposed to be an a7v133-c, but has the 17v133 bios. can anyone verify that they put sound on the original a7v133? and if they did, why isn't anything detecting the onboard sound? (yes, the jumpers are all correct and no, it says NOTHING about sound in the BIOS setup). what's the chances i can flash the board with the a7v133-c BIOS?