Collision does not affect my blueprint

Hi, I am new on blueprints. I have created a blueprint where I can change parameters of an material when the first person character hits another mesh. For example the first person character hits a tabel. The material of the table will change in time based on the hit location. But now instead of the first person character I want to use the hands collision of a blueprint I have found here Because I want to make a project for oculus quest. But the collision does not seemd to affect my materal change blueprint.

I want to achive when the collision of the quest hands (the quest mesh hands are the parents of the collision) hits a mesh (of my material change blueprint) the material will change based on the hit location.

The material change blueprint is based on this tutorial

Thank you