I got a new computer that can now player R6V2 with the settings maxed out. I have a copy on steam and I bought a copy for a friend so we could play co-op.

Turns out, I can't play multiplayer. I used to be able to play fine on my old PC.

No firewalls, windows firewall is off.

I forwarded all the ports, and I couldn't even log into multiplayer.

I turned on DMZ, and I can log in, but every time I try to join any sever I get:
"Unable to establish a connection to the server"

If I try to host a game, then leave that game, and attempt to join a sever, it acts like its joining, but still doesnt work.

The problem is like in this video.
http://www.youtube.com/watch?v=jd28sQjSry8

What do I need to do to be able to play online?

Also:

Antivirus is turned off (AVG free)

Punkbuster has been manually updated.

Computer and router settings are up to date.