Skeletal Mesh colison from Static mesh

Hello. I have a custom colision for a skeletal mesh.

I need the colison for a Skeletal mesh (exectly the same mesh, same scale, same position, same rotation, but with a few bones added)

So, i right clicked the big sphere (i think it is the root bone’s one), and selected “copy colision from static mesh”, and then selected the house. The copyed colision looked like this:

When i try to scale/rotate the colision, it just dissapears.
What did i do wrong?

you sure its disappeared? you still have something selected in your picture so it makes me think the collision got scaled way up.