I have a regular xbox 360 and I don't have the money for the wireless networking adapter so I am using an Ethernet cable to connect and it worked before but all of a sudden it started connecting but saying that there were service alerts then now it won't connect at all it says the Ethernet cable is plugged in but when I test xbox connection it fails saying my Ethernet cable isn't plugged in I don't know what to do I really want to play on Xbox live please help