Sonoff MQTT Switch installation

[ESSCHENK]

Hello,

I am new to MQTT and to Domoticz
I have a working Domoticasysteem with Homeseer.
Where MQTT is working Fine.
Maybe I want to go to Domoticz, but I can’t MQTT not working.
I have installed the MQTT hardware driver.
Made a Vitual device,
I use Arends software (5.8.0q) in my Sonoff device’s
Put the IDX in the idx1 line.
When I push the button on the Sonoff I see status change in Domoticz device.
But when I want to sent a switch command from Domoticz nothing happends.

This line I put in the on and off line

script://node18/DomoticzOutTopic on
script://node18/DomoticzOutTopic off

MQTT Host 192.168.1.15
MQTT Port 1883
MQTT Client &
Fallback Topic DVES_CCCFF1
MQTT User DVES_USER
MQTT Topic node18
MQTT Group Topic sonoffs
MQTT Full Topic cmnd/node18/

Anyone any idea where to look

Thanks in Advanced
Ed