Diablo, do this
Code:
Control Panel >
Sound and Audio Devices >
Audio [Tab] > Sound Recrording [section] > [Select your microphone] > Apply [button] >
Voice [tab] > Voice Recording [section] > [Select your microphone] > OK [button].
TS and Vent allow you to specify within the program which sound card you wanna use for recording. Whereas CSS and other games will use the default windows assigned soundcard. Also, make sure in volume control that your mic is turned up, has DB+20 Boost on and is ticked in the Recording menu
How to get to the recording menu
Code:
Volume Control >
Properties >
[Select the correct sound card] > Recording [radio button] > OK >
Select Microphone [tick box]
That should work. If that doesn't check the ingame settings for Voice.