hello i just installed the ATI radeon hd 2400 pro hisdigital (dot) com/html/product_ov.php?id=331&view=yes video card. Everything went perfectly. But when i started a game i lost my sound suddenly. So i looked there my device manager and seen that my onboard sound card and the video card sound thing were both on. So i disabled the video cards sound and went on from there. but after a reboot i discovered my onboard sound was not working anymore. so i checked out my volume Control option and it gave me a message that there was no active mixer. I then uninstall my video card and tryed to restore my onboard sound. I rebooted and got nothing. So i went to dxdiag, i discovered this DirectSound test results: Failure at step 3 (DirectSoundCreate): HRESULT = 0x88780078 (No driver) .for the realtec AC97. Help?