Same error message. Checked with troubleshooting section and reset my Comcast Modem/Router so that all ports are forwarded correctly. Changed my firewall settings to medium/low. Using Windows 7 so that should not be an issue. Contacted Comcast and they say my signal strength is ok. So, with all of these troubleshooting steps and nothing is working, I will not be able to play GW2 anymore until they decide this error is affecting enough people to investigate the problem and fix it.