"This account is currently logged in."

I was logged into my account a few minutes ago, creating another character, when I got a message that said I'd been disconnected from the server, and to log in again. It didn't boot me off, so I just hit exit until I was back at the login screen...but when I tried to log back in, it kept telling me that the account was already logged in . I tried exiting the client and restarting it, but it keeps telling me the same thing. Anything I can do for it NOT to think I'm logged in?