DescentBB

I use the DXX-Rebirth game tracker to find when a multiplayer game is going for D1/D2, but half the time when I get into the program to join it refuses to connect. This doesn't happen all the time and I'm able to get into some games, but it's frustrating when I see a game I want to join and I get the error message talking about that the "host port might not be open", "host is running a game version I don't understand", etc.

Is there anything I can do to make it so I can join games more reliably?