Thanks for the support and Advice guys.
Its finally working Perfectly!
I had the same problem with the official headset I think tis a bug in the firmware because its not possible to adjust higher or lower than "3" in the mic sens options.
It's a bug in the game. I have the same problem playing zombies with my buddies (I have the official mic)
Usually it stops the next round, if not I'll power the ear piece off then back on again.