The game only disconnects when it can no longer talk to the server. This is usually indicative of something interfering with network communications. It can range from some security software on your computer to any router between you and the Internet causing the problem.
It can also be your local router needing to be power cycled.
The best place to find out where the problem might be is to start with a Ping Plot (
www.pingplotter.com free version at bottom of the download page) and run it to 71.252.137.149. It will show a graphic representation of the path the data packets take
to the game server and possibly any anomalies along the way.
If the data does not make any sense to you, feel free to post it here (as an image), or save the data as text (Ping Plotter can do that) and email that data to me. Happy to review it for you.
In the meantime, make sure you disable any anti-xxx software, try power cycling your router (assuming you are behind one).
The message you are getting about a firewall, from the game, means the game cannot establish any type of network connectivity. This is a pretty hard failure. A browser is not going to show this problem as they do not depend on real-time connections in order to run.
