Usually when this happens its when you click the join-game button before you auth, but from what you've said it looks like that's not the case. I'm not sure exactly what conditions need to be met to verify a blockland ID. I assume its something close to having a connection to the auth server, not having 2 people playing at the same time with the same ID, and not having a revoked key. Maybe ask badspot what those conditions are exactly, and then determine whether or not you are meeting them. Maybe re-set your IP and see if that helps..?