Annoying mic prob

[cmac79]

Everytime i play l4d or l4d2. and i start a game sp or mp when the game loads my mic unmutes itself ,the boost goes off and my mic picks up everything and plays it through the speakers. and i then gotta lower the game open my settings and mute it again and turn mic boost back on. it gets very annoying havin to do this everytime and its annoying to other players when they gotta wait for my a$$ lol. Any one know what would be causin this.im usin a sb audigy sc

[KaptCrunch]

open your xfi control panel to mixer an see Mic Envirment slider adjust to zero