Vista Audio Subsystem

hi,

i tried to check whether my soundcard has suitable drivers by opening the
sound icon on the classic control panel window and then i selected sound and
the recording tab. i tried to look for Stereo Mix, Wave-Out Mix or What U
Hear, but it was not listed. so i right-clicked on the blank area of the
recording tab and selected show disabled devices from the pop-up menu. but
nothing showed up, i was looking for something like Stereo Mix, Wave-Out Mix
or What U Hear but i could not find them!

any suggestions on how enable Stereo Mix, Wave-Out Mix or What U Hear options?

thanks for your help,

sanjay mehta