i had xp and upgraded to win 7 and now my microphone is not working (i use ventrilo). i have the HDMI hooked up to my monitor along with the regular monitor plug. it shows digital audio (HDMI) as my default device with green check mark. however when i open AMD catalyst it says my window settings dont support default audio. also when i go to the recording tab in the sound menu it says no audio devices are installed... can someone please point me in the right direction?? thanks for your help!