New Fibaro switches FGS-213/223

A noobisch question, I just want to turn on and of two different lamps with de FSG-223. Ive installed everything and with the app I can turn off and on both lights. I’m using a momentary dual switch and the first lamp is connected to S1 and the second one to S2. The S1 lamp is working fine but the S2 is not reacting on the switch.
What should be the paramaters for this config? I’m lost! :frowning: