Unplug your router and plug it back in.

thats a shame you said you called your ISP and didn't help you out? I would call them up again they are always your best bet mate youv'e done everything right and i hope it gets fixed soon becuase i know myself i can't live without live

You might ether have to buy a new modem or restart it

Reset everything, or call your ISP...

Make sure to check your ethernets cord's ends where the pins are. Make sure that one of the pins isn't broken becuase it could really cause connection failure. (it happened to me)

if that doesn't work then try this website

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thanks

try to restore the xbox ip to factory default

Try to clear your cache on your Xbox. If that doesn't work you go look for a newer firmware on your router. Go and type your router number and go see if there is a newer firmware update. If there is you will connect for sure. This is what happened to me. Good luck and hopefully you can connect back sometime soon.
Thanks, -LegitSbs

you might have to buy a new router dude thats what i did and now my connection works

John_US wrote So, my internet connection is fine, and its fast as usual, but when I try to sign onto XBL, it says "Cannot Connect" It says there is a problem with your connection. Usually it is because my router is not connected right, but now its getting to be a problem.

~I have shut it off
~Contacting MS, will not help
~Any useless posts will result in -REP
~Any feedback that helps with recieve rep, and if it gets to work you'll get 100 rep.

Please help guys.

ok is your router connected up right. also make sure if you have a wireless router make you have the wireless signal is up

You should go to xbox settings.
i think it's either system settings or maybe just network settings. im not sure if network settings is in the system settings... just check.
get into network settings and check your connection.. just a guess not sure if it will work..