It's possible that someone else is using the same code as you are. If there is a hacker that made a keygenerator or has been distributing the program as a warez version, there could be someone out there with the illegal version of your key code. Then the server would see two of the same code trying to access at the same time and disallow your attempt. I may be mistaken though since I don't play Q3. (I'm a UT'er 🙂) If, however, I am correct, there isn't much you can do. Maybe contact the Q3 tech support and ask them what you can do...