Hmm, I’d log out, and then log back in. I get this once in a while myself if the session cookie expires, and it doesn’t realize it.
If it continues to happen, use the contact form at http://webwizards.net/wordpress/ to send me an Admin username and password (not yours, create a new one), and I can log in and take a look deeper. Then you can delete that admin user afterwards.
Let me know if it’s still an issue, and follow up using my contact form please.