Activate siren on Flamingo FA21RF smoke sensors

Hi Bert.

I have a little issue.

I just received two Flamingo FA21RF smoke sensors. I had no problem to include them as security devices but I'm having issues to setup them as output devices to activate the siren from Homeseer.

I had read the manuals and there there it talks about a pairing process. What I did was to pair again my two smoke sensors pressing the "on", "off" or "group off" buttons on homeseer without luck. Probably I'm not doing it right but I'm a little lost here after a lot os tests.

I already tried with the related commands at Rfxmngr program. I followed the procedure to create a group with my detectors and sent some commands, the sensors beep but I still can't activate the siren from HS.

I discovered I can activate them for a short time by sending a panic signal from the Security1 tab on the Rfxmngr program.

Can you help me, please?

My setup:
HS 3.0.0.297
RFXCOM Plugin 30.0.0.33
RFXtxr433 firmware (don't know, Rfxmngr reports just "1", you sent me it on Jun this year).

As an additional question, how can I send the commands with scripting? I found an example for Lighting4 but can't adapt it for flamingo.

Thanks.

Mario