Here is my situation, I have a fios wireless router/modem with the wireless radio disabled. I have an previous gen airport extreme "N" broadcasting a 2.4ghz n/b/g signal connected to the wan port on the fios router/modem. Then I have an airport express "N" broadcasting a 5ghz "n" only signal connected to the airport extreme. So I have 2 wireless networks running 2 different signals and both have their own network name. Everything I have connected to wireless works fine, PS3, Apple TV, 2 Macbooks, iMac, iPhone. The only thing that doesn't work is the new Xbox? It actually connected to the 2.4ghz n/b/g signal and said your Xbox is connected to the internet but can't connect to Xbox live? WTF? Any help or insight would be appreciated.