Migrating hosts, if you cant login after the restart, open CMD and write ipconfig /flushdns and wait a few minutes, you may have to restart your computer first to login again.!
Disclaimer: Tutors are normal players who would like to help other players, anything they say do not represent any official statement unless the statement is made public (by the administration) and can be refered to. If you see any tutor misbehaving, report them directly to us at the forums under section Private Support Board.