-english is not my main language-
There are a lot of people with packet loss issue. My problem was really bad, I had from 500 to 1000 packet loss and then disconnected.. But this works also with low packet loss. You have to go in the page with your modem settings (where you have to log in as an admin) and activate an option called DMZ and put your pc id on it.
It should works, at least for me it always worked.