Cant activate simulate physics with collision

Development World Creation
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1

Hey,
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?

Thanks

2

Ok, I have it. The name had to be