Hi Winger1,
Have you tested/setup the microphone in Windows, so you're sure it works?
If so, try going in to the Options menu on the clipboard - select Preferences/Game Sounds
You'll see drop down selection lists for Microphone, Speakers, Headset, etc. Your mike should be shown as a selection in these lists. I use a couple of different headsets, and sometimes when I switch between them I have to come here and manually change the selection to get it to work. Happens with my mike fairly often, unless I have it plugged in already when I start the game.
Do you know you can tune yourself to the radio channel to test your transmissions? You just bring up the radio buffer with the '/' key and type ".radio 5 winger1" (if that's your in-game handle). Then when you press the channel transmit button, you should hear yourself on channel.
<S>