Cant activate simulate physics with collision

I have a StaticMesh made in Maya2017 and there I added a collision-Box ( name: UCX_Arrow_01 ).
But when when I imported the mesh into my Unreal project, I can not activate physics.
I’ve read, that the mesh must have collision, but it should has?
Do you know, what I did wrong?


Ok, I have it. The name had to be