I'm helping a friend to set up a COD4 server. the server is already running with no issues.
Joining the server raises the exception: key code in use. try to connect later while I do manage to join other unofficial servers.
What causing this exception?
Is this a client-end or back-end problem?
Why im not getting this exception on other unofficial servers?
How key/ip binds work for COD4 and where they stored?