Issues with lightning (DMX pluging)

i use unreal** 4.26** with the last dmx plugin. i have a little problem with it. I use SPOT and WASH fixtures :

BP_MovingHead, original file for the spots (BMFL)

BP_WashLED, original file for the wash (aura XB)

no problem with spots; BP_MovingHead

**with BP_WashLED : **the light passes through the material and does not illuminate it!!

any ideas about this problem?

Thank you by advance

Jeff FreeMAN

Please HELP ;-(