HA-Bridge + Domoticz + Harmony

[xender]

Hello !

I'm using HA-Bridge + Domoticz + Logitech Harmony Elite.

I've configured an ON/OFF wall switch for my bass speaker whose working great with domoticz
this switch show up correctly in my Ha-bridge but I have difficulty to make it turned OFF when I start an Harmony Activity.
ON is working on an another Harmony activity.

Domoticz Device :

PriseAmpli.PNG (33.56 KiB) Viewed 709 times

I have configured my switch to turn Off in the HA-bridge device in "On Items" but it's not working :
Name : Show TV
Device Type (Informational) : Activty
Map Type (Legacy) : Harmony Activity
ON Action
Type : Hamony Activity
Target Item : {"name":"27464463","hub":"Harmony Elite"}
Type : Domoticz device
Target Item : http://192.168.1.27:8084/json.htm?type= ... tchcmd=Off

RegarderTV.PNG (37.3 KiB) Viewed 709 times

The one working have this configuration :
Name : Show TV + Amplifier
ON Action :
Type : Hamony Activity
Target Item : {"name":"27467760","hub":"Harmony Elite"}
Type : Domoticz device
Target Item : http://192.168.1.27:8084/json.htm?type= ... itchcmd=On

RegarderTV+Ampli.PNG (36.82 KiB) Viewed 709 times

Please can you help me finding what I'm doing wrong?
Thanks