Yesterday I bought a basic $20.00 G.E. Headset + Microphone both of which just plug into the standard 3.5mm jack in the back of my box. I did the basic windows mic checks and it worked out fine but I open up CS:S and suddenly I can't get any input at all. I run the mic test in game nothing happens. I got no voice output in game. Nothing. I can't figure out what the deal is and now I come to you the people of the GC forums for help