I know this won't be of much help at all but I am having the exact same problem, I've tried everything you have and what others have suggested (the router, deleting cookies, reinstalling the game) and nothing has worked. I would like to let you know that I have contacted a staff member about the issue but I haven't gotten anything back. If you figure out the problem I would appreciate it if you would let me know and I will of course do the same if I figure it out.