Use Physics Asset Tool for collider

Hey Guys,

I try to use the Physics Asset Tools to have my character interact with the wolrd. My character is a wofl so the capsule collider is not working very well with the shape of the body. So I was thinking to use a small capsule and add the missing collisions with colliders I attach to the bones outside my capsule.
But these additional colliders just go throug any geometry. No collisione happening. Anyone an idea how to solve this?

Cheers