This could be happening for a number of reasons.
Your browser accepts a cookie every time you log in to the databases. If you made a mistake the first time you tried to get in, the browser remembers. To easily fix this, clear your browser history and completely close your browser. See "How do I clear my browser's history/cache?" above for more information.
If you are using a College ID as a Library card, you may not have activated it as a Library card. Contact Circulation Services at (630) 942-2106 for assistance, or use our Library Card Request Form to activate your College ID.