"Key Code in use, try again later" (COD 4)

[Schizophonic]

I now get this message after my brother decided to mess around with the router when i was playing a round.

I tried logging onto other servers, still the same message. I cleared my key code and still no luck.

What can i do?

 

[Schizophonic]

I updated punkbuster after googling it and it managed to resolve it.