Are you on wireless or wired internet connection? I had this happen to me when WotG came out and for the life of me I couldn't figure out why I kept D/C'ing every 5+ minutes or so too.
First I thought my comp. processor was going. Checked: nope, perfectly fine.
Second: checked the internet connection rate of data transfer; hey there's a problem with packets flowing smoothly! Called my ISP, they said router was going slowly, sent new one.
Waited for router and help to install router, turned on game; still happening.
Third, they thought the signal was being redirected from too long of a wire line now when they reconfigured their band directionals. Nope.
Fourth: an actual wireman came to house to inspect it andsee if the wire was not connected correctly. He said, "Did you know your wire to the telephone pole looks like squirrels have been chewing on it?" Changed wire, put in one with coating they do NOT like taste of (yes they have those I found out).
POOF!: Game ran better than ever!
Moral to story: Can you have the ISP company check to wire to your house from street to see if THAT'S the problem?