I am at a fed ex and trying to log on to my mobile me and can't. Any one know why?

There is no Mobile Me anymore.

You need to start using iCloud and you should have been sent prompts from Apple to move your Mobile Me account info.

As was announced on June 6th, 2011, with several follow-up emails over the next year and prominent notices on the website, Apple's MobileMe service was terminated on 1st July 2012, and the limited 'grace period' during which you could download your files has now ended. If you had a MobileMe subscription, and have not migrated your email, contacts and calendars to iCloud and your iDisk contents and Gallery to your computer or another hosting service, then you can no longer do so and the contents of your account have been deleted.

More details in this page: R.I.P. MobileMe.