How to use a ball as a key to change material instance

I have been running into issues using a physics ball, as a trigger, to open a door, and change the material instance, however, I have been able to use my own character using a similar method with a treasure chest. I Have 1 Static mesh with 1 material Instance, 1 static mesh with 2 material instances, and 1 skeletal mesh with 1 material instance.

Hi Ghostllamasniper, sorry but your screen shot is very difficult to read. Perhaps take a couple.

Yeah, here, I edited the post, that should be much better.

Ive been messing around in the Engine, and I still cant find a solution, does anyone have an idea?