Microphone not working after using RogerWilco

Hello,
since I used RogerWilco to use a mic for speaking with my brother when gaming, my mic port stopped working. We tried plugging te mic into his computer and it worked fine, his mic did not even work. Even after I have reinstalled windows severel times it just refuses to work. I am not sure what type of card it is, but it uses a C-Media driver. The same thing happened on another pc with a other type soundcard. Please help me a.s.a.p.