I currently have two xbox 360's. I have Xbox Live Gold, and two different gamertags for each account. One Xbox 360 is connected straight to my router. The other is using the wireless Xbox 360 adapter. When we both want to play at the same time on Xbox Live, one of us gets an error that our account cannot play at this time. This only happens when we play at the same time. When only one person plays, it works perfectly fine. The Xbox 360's are connected to a a Netgear MR814v2 router, which is connected to a TJ 715X Terayon Modem. I have a Adelphia Cable. Thanks for your help.
Do u have two Xbox Live Gold accounts or 1. If u have one then u probaly need to get another one but try posting on team xbox
he said he has two. enable dmz on your router. I dont know where it would be located in config though.
Also you may want to assign a static ip to one or both of them because they might be trying to get the same ip from the router. Just a guess though
