So you get that messag every time you try to play?
Make sure that:
1. You have good internet connection
2. Your login page isn't logging you out everytime to try to connect.
If #2 is the case, try a page refresher to keep that from happening. This is a good one: http://www.refreshthis.com/
Hmm, definitely try restarting your FH and logging in a couple times. Sometimes this happens to me and restarting a few times does the trick. I'm not sure why it does this, but definitely give it a try.