Zomblard

hello I'm trying to create a cloth I think I'm not very far from the goal but I don't understand what is blocking. in blender I use the new character sample provided by bohemia I export in fbx and I import in workbench When I move my rig this moves my garment but when I equip it on my character this one does not take the rig here is a video example: Video sorry for my english i use a translator