Ok im trying to play online but everytime i try to enter the server it says: Error, key code in use, try to reconnect later. But is says my key code is valid when i typed it in on the options menue. ???

Hello
I have the same problem i tried to look for a crack to bypass it but i carnt find anything yet
Regards
Darkgamer

Hey i have the same problem sometimes but it lets me play. I go for a while sometimes it never bothers me but all of a sudden i get the error. I get shut out of my communication program, GSC and my internet goes down. I dont know if its my internet or cod4 but i have to restart my router and wireless center thing and it will usually work after that but not all the time

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Thats one doodle we cant undiddle!

Can i ask did you download the game from a p2p site or did you buy it either on disc or from steam.
If your copy is legit then i think there is a way round it search this forum
If you are running a pirated copy then the key you are using has been stolen go buy the real thing its worth it

I bought it from target :P

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Thats one doodle we cant undiddle!