Ok I had comcast for about a year and then all of a sudden my gta stopped working. I would get in a session and boom everyone left at the same time. I ended up getting ATT dsl running 10 mbps and could play great no problems. 3 months later with att being to slow for work and school things went back to comcast 75mbps. Same thing is happening again, I still have att for a week and I can switch back to it for gta but it still doesn't work for comcast. Is it because of the mbps difference why it's not working? This one makes my head hurts any input would be awesome.