Fibaro FGS221

Hi everybody!
Does anybody know why my Vera Lite do not find the FGS221 during the activation process?

What can be the reason once I’ve done the procedure as described every where (with the triple button pushes on the device while Vera is in the “searching mode”)?

Shall I doubt about the wiring? I’m not an electrician but I’ve double checked…

For further informations: my final pourpose would be to control two bistables switches, one connected to a single switch lamp (S2) and the other to a double switched lamp (S1)…

Thanks in advance!