I have another way to login if you're having problem with the screen goes back to "Free to Play" page.
1. Go here
2. Select "www.aeriagames.com" there
3. Select the cache limit (the slider thing) to unlimited
Maybe you need to clear your browser cache, dunno.
Maybe you need to delete goldenage.content.aeriagames.com at the link up there, but i don't think it is necessary.
But at least I don't need to clear my Flash cache.