Connect to the livebox with the cable and access the router by clicking on the icon Configure the Livebox or if the PC you are on now is connected through the livebox click here
By clicking on access to the configuration pages, you'll be able to modify the advanced settings of your Livebox.
You will have to enter the username and password of your Livebox. These are different from your Orange Broadband username and password.
The default username and password for your Livebox are:
username : admin
password : admin
Click on Configuration - Advanced - Wireless
WPA or WEP security
WPA security only
WEP security only
it will probably have a green dot in WPA or WEP
click WPA security only.
try and see if your laptop can then open a web page via the wireless setting.