Don't know what is going on. I have only ever played and lived in the US and have been using the same key for about 2-3 years now. I strongly believe that my email was compromised and the auth information was found out from that. Or this is some other reason causing this I don't know about. The exact message I am getting is "This key has been used in the Europe region recently. You can use your key only on one region at a time. Your session on the NorthAmerica region has been invalidated." I'll post a log as well. Not sure what I'm supposed to do to fix this problem. I've contacted support through email as well.
take a look here plz http://wiki.thebuddyforum.com/index.php?title=BosslandGmbH:HelpDesk:About_Regional_Infrastructure