Something may be up on your side of the sessions...either locally or somewhere within the routes you've been assigned by your ISP. Both myself here in SC and a friend up in the Great Lakes area can play for hours on end with no issues. Double-check your config against the network troubleshooting guide and if all that checks out and you still have issues, may be time to bring in your ISP's Tier3 support to monitor things while you play. With any luck they will capture an exception they can escalate to the proper party to improve the quality of service.