I've had my jtag for about a week now, and everything was working fine. But today I went on to do a system link lobby for a friend, and when I go to join the game on my retail Xbox, no lobby shows up. I've done system link lobbies before and this was not a problem. I've done everything I could think of like turning my router on and off and using a different Ethernet cord to connect my jtag to my router. Please help me if you can!