Hi Everyone! Can somebody please help me to get to work my powerline WPA4220KIT?

I also tried with the classic Pair button, but it doesn't work.

Tried with the individual Password of the Devide, but it doesn't work.

Their are in the same network obviously.

I already use a couple of Fritz! and they worked well and fine since day one, but now I need to extend my connection to my garage/basement.

Hope someone could help me, thank you!