08.02.2010, 18:09
Make sure that you are using a correct client to connect to the server:
If the server is running version 0.3a you need the 0.3a client, and if its running 0.2x you need the 0.2x client.
If the server is running version 0.3a you need the 0.3a client, and if its running 0.2x you need the 0.2x client.