I'm sorry you're having problems with your app. I would suggest deleting the app and then reinstalling it (it will not delete any of the content on your profile you'll just need to sign back in). If you continue to have problems email customer service at: http://asksuspport.custhelp.com/app/ask.
It will probably work sooner or later, sometimes it just needs maintenance (ie when it says "We're down for a little fixer upper"). Try what Lunger said. If it doesn't start working within about an hour, email customer service, where you'll talk to Eric. He's a very, very smart and helpful man!