I've been without Xbox live for a week now, and my ISP has NO idea how to fix it... I can get network and internet connection, but the xbox live test fails after about a third of the way... we've tried static IP addresses, wired and wireless network settings, and still NO connection to xbox live... the only advice xbox support gave me was that there was not enough bandwidth for my ISP to support XBox live, but that's not the case because I have 3 other computers running of this network. I've tried all Xbox solutions through the website and Nothing seems to work. I have no idea what to do. Any suggestions?