Discussion wrote

Reset the network settings
Reset the network settings on your Xbox 360 console to the defaults.

Here's how:

Press the Guide button on your controller.
Go to Settings, and then select System Settings.
Select Wired Network.
Select Configure Network.
Go to the Additional Settings tab, and then select Restore to Factory Defaults.
Select Yes, Restore to Factory Defaults. This resets the console's network settings only, and not other settings.
Now, restart your console and test your Xbox LIVE connection. Here's how:
Restart your console.
Press the Guide button on your controller, go to Settings, and then select System Settings.
Select Network Settings.
Select Wired Network.
Select Test Xbox LIVE Connection.
If this solution worked, your console will connect to Xbox LIVE.
Not work? Please tell me which error are you getting?

Purr wrote

Discussion wrote

Reset the network settings
Reset the network settings on your Xbox 360 console to the defaults.

Here's how:

Press the Guide button on your controller.
Go to Settings, and then select System Settings.
Select Wired Network.
Select Configure Network.
Go to the Additional Settings tab, and then select Restore to Factory Defaults.
Select Yes, Restore to Factory Defaults. This resets the console's network settings only, and not other settings.
Now, restart your console and test your Xbox LIVE connection. Here's how:
Restart your console.
Press the Guide button on your controller, go to Settings, and then select System Settings.
Select Network Settings.
Select Wired Network.
Select Test Xbox LIVE Connection.
If this solution worked, your console will connect to Xbox LIVE.
Not work? Please tell me which error are you getting?

It didn't work but I'll rep u