only thing I can think of would be clear your history and cache. If you're not sure how to do that, look it up for your browser. I'm not having any problems with Elite at the moment.
Make sure you are using http://elite.callofduty.com to log in. If you are unable to see the log in bar, you can also visit www.callofduty.com and the log in bar should show up there. If you do not see it at that point, try clearing your browser cache and cookies.