i have a linksys e2000 router and a SBV5120 Motorola modem but I do not believe they are the problem. I have an open NAT type and each time I log into Xbox live, I will get disconnected for an unknown reason after about 10 minutes. I then immediately go to the Test Connection Screen where it tells me my connection is perfectly fine. I checked the xbox live status and it says it is up and running but my xbox can't seem to be connected to the service. It has been this way ever since a hurricane passed over and blew out the power while the xbox was online.