Xbox LIVE, no connection.

All cables plugged and internet works on everything else but when I test connection, it does not work.

a little more detail, please? can you connect to the internet, but not xbox live? did you try resetting your router? 

Did you input the 360's IP address into your network?
 
Edit: Wait, scratch that, you shouldn't need to do that since it's connected via cable instead of wireless.

can you do the xbox live connection test on the 360?

" can you do the xbox live connection test on the 360? "

Is your network sharing set propely if your using a wireless connection ?

Try restarting your modem or your router, it might not be able to pick up the IP Address

I've tried resetting and still no connection, it's worked many times before but right now it isn't.

Now it connects at network but not at internet.