Audio FX pro 5+1 Headphones aren't working?

I have some Audio FX pro 5+1 Headphones that recently stopped working. I was in ventrillo and all of a sudden the input wasn't working right. I could hear the other people talking but they couldn't hear me. I checked and nothing was muted in vent or on my headset. I was thinking maybe the drivers need updates, but I cant find the drivers anywhere. Any help?