I am unable to connect to XBOX Live. I've tried all of the diagnostics and everything seems to check out ok. According to my console, I should be able to connect to xbox live without any difficulty. When I hit 'A' to sign into my profile and hit A again to select my profile, the "Signing in" window would appear with the animated loading circle. But nothing happens after that. The Signing in window was "loading" for 4hrs yesterday before I turned off my xbox. Any suggestions?