Try to do this things:
Try to check you'r internet connection, and fix errors.
Close you'r Anti-virus/Firewall. Or add an exception in you'r firewall
Try to delete whole crossfire+Map, and re-install.
Than restart you'r computer.
Maybe go to the website and, check if u don't get banned by IP.
If you got banned, try to change you'r ISP, or try an IP hider.