I cannot join or host and get other people to join my MP games, I keep getting "Cannot find host" errors. I have a router and cable connection, I've tried Vnet, direct IP, and other games (Age of Empures), nothing works. I've added the channels for firewalls from the Mower's FAQ, still nothing. Counterstrike/HL seems to be the only MP game that works without problems. Is there anything I can do?