I've changed my carrier from Vodafone to Fasteb (SKY Wi-Fi)

I've to re-install my PowerLine extender and I reset the extender (not the adapter) to factory default setting by pressing and holding for 5 seconds.

Then I proceeded with the procedure, the pairing was ok, an then I cloned the router's Wi-Fi setting (WPS button on the router, then WI-Fi button on the extender).

Everything seemed to be ok (all the were on and green), but I realized that I was able to connect to WiFi, but I had no Internet access even if the router (and the other devices conncted to the router) connect to the Internet.

Can someone help me ?