I'll get right to the point; when I boot up my Xbox, the system connects to LIVE just fine. But when I get into a party with another person(s) or I try to start multiplayer matchmaking in a game, I will be disconnected from LIVE shortly thereafter. I will then re-connect to Xbox LIVE and everything will run just fine afterward. It doesn't do this at friends' houses so I know there is something wrong at home, at only at home. Maybe there is an issue with my router or firewall or something? Any help would be appreciated. Thanks.