Follow the steps below and you should be up and running in no time at all.
* Open up your web browser
* Type in this in the address bar then press return: You are not allowed to view links.
Register or
Loginhttp://192.168.1.1
You will be prompted to enter the Livebox username and password. The username is: admin. The password is: admin
* Click on Security/Wireless Configuration
Write down the WEP Security Key (26 Characters long)
* Go go to the 360 dashboard
* Select the System Blade/Network settings, Choose edit settings
* Scroll down twice to the wireless section and press "A"
* Your Livebox network name should appear, select the network by pressing A
* It will then ask you for the WEP Key, enter the 26 Character key you noted down earlier in CAPITAL LETTERS and no spaces. DO NOT PRESS DONE AT THIS STAGE
* Press the button in your livebox marked with a number 1.
* Now press done on the 360
This should work but: If you are still getting the "IP Address Failed" message after doing the above. Try disabling the security settings in the Livebox.
Restart the Livebox then carry out the instructions above again. If it works ok, re-apply the security settings after you have successfully connected.