Setting up Vision Alarm sensor and Siren

Hi Guys

I purchased a Vision Sensor and Alarm. They all connect fine. I have it set up like this:

Scene to trigger Alarm if armed sensor is set off.

This works, BUT, when I then turn off the alarm. then Set it to arm again, the Alarm goes off without anyone walking past the sensor.

any help would be very appreciated.

Can you please explain how you manage to connect the Vision Alarm Siren? ( Mine is on batteries )

ZM1601EU

Thanks

Regards,

Kell