To explain is this, I just up my son Xbox 360 with a live account using my hotmail account. I also let my nephews use the same hotmail account to set theirs up. Now it will not let us play against each other. It will let us see each other avatar but we can’t play. It will also not let my son play games like Call Of Duty. We keep getting error messages. Is there any other way to set this up some we can play games in Xbox live. We are set up as wireless.