Yeah... I didnt know how to open ports for this modem, but I finally found the user guide for it on bellsouth support page.
For other people who have SBC DSL. You type in Internet Explorer search bar "http://launchmodem" All of your info should come up automatically, but you might have to type in your username(e-mail), and password.
You click on Expert mode, then you'll see a warning screen, just click yes, go into expert mode. Then you'll see an extra button on the left (Configure) Click it. 4 drop down buttons should appear, click on NAT, and you can enable / disable ports there.
They have 2 preset profiles, for MSN Gaming Zone.
These are the ports zone.com specifies you need open in order to play.
http://zone.msn.com/en/support/article/support3401
I didnt see 80 or 443, so I made a custom service and added those ports. I still have a problem though. I'm only able to host games. When I try to join a game, and someone launches, either I will get AV after AV and I will be the only one in the game, or I will get an AV and MTM2 shuts down. Also not everyone can join my games, so I'm guessing there are still some ports that need to opened. Possible Trigger ports, but I still dont know.