You need to free up port 1626 on your firewall. If you can't, try to free up one of these ports:
59222
80
That should help. And as always, try checking the "i am behind a firewall" option, then, connecting to EACH of the server. If/when that doesn't work, uncheck the option, and try connecting (to each of the servers).
But you WILL need one of those ports freed up
