Okay me and my friend have been trying for hours to figures this out. I have 2 wireless xbox 360 slims and 1 wireless belkin router. both 360s can connect wirelessly to xbox live no problem. but when my online friends send both a party invite to both xbox's, one will connect to the party were the other cant and both xbox's get disconnected from party and live. we went over all the routers settings, tried port forwarding, cant find a setting for port triggering but the router supports universal plug and play and is enabled in the routers setting. we tried even doing both 360's wired and same thing happens. both xbox's show sepperate IP addresses as well. Any help and suggestions would be great as we are trying to get a party of 4 going for a game. Thanks.