Ah, I'm Mad! WI Help!

Well, I am at another computer and when I try to log in and click in the "User Name" box, the words User and Name stay in the box. When I clear it and log in it just says Thank you, Catza for logging in. And nothing happens. And when I click "Click here if browser doesn't automatically redirect you" it just sends me back and does it again! Is there anything I can do to log in?