If you are repeatedly receiving a 201/301 error message on a patch day or shortly after the game servers come up from a patch, this is likely due to the large amount of people trying to patch simultaneously. Please either continue trying or try at a later time when the load may lighten.
If you are experiencing this error message during non-patch days, please try the following:
1. Disable any firewall software and attempt to connect again. This includes the built in firewall in Windows XP. (if this fixes the issue you will need to configure your firewall to run with our game or leave it disabled while playing, the knowledgebase has some steps for configuring certain firewall programs).
2. If a hub or router is being used as a means for Internet connectivity, please try connecting your network interface card directly to the cable or DSL modem. (if this resolves the issue then the network itself will need to be reconfigured to properly allow traffic through, this could be the result of a hardware firewall on the hub/router).