When I launch Call of Duty: Black Ops Multiplayer, and go to the server browser I click refresh to get the list of servers but nothing comes up (even though it says there are servers in the top right hand corner of my screen.) Also, I will try to join a match via match making but when i click "Ranked match" a notification appears on the bottom of my screen that says "Could not join match". Also, I have made sure to add steam, and black ops to my firewalls exceptions list. I have also tried resetting my modem.