Try port fowarding? I have the same router. To me it is a little tricky since I am using DSL. With RR it was ok. It seems I lag alot on games now. I thought is was all DSL. It is about half and half. D-link and DSL.
Sorry, I should have told you. I have forwarded my ports on ports 80 (HTTP), 443 (HTTPS), 7777, 7778, 7779 and 8000. The last four of which are for running a game server(s) on my home PC. These server(s) run on those ports.
