I keep getting the error that there's a server check/firewall issue. Yesterday I played the game fine. Today, I was wondering if it was because I was switching locations that was the problem - nothing else has changed about my computer etc. I'm in a different city for the weekend and was wondering if that might be the problem (different IP address??).
Switching IP shouldn't be a problem. Usually when you get that message you have a firewall/antivirus blocking your connection, could be the ISP as well.
I've tried disabling my firewalls and I don't have any antiviruses. I guess it's the different ISP? Do you think maybe the modem itself has a firewall on it?