Collision mesh doesn't get imported as a collision mesh

Development World Creation
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1

I have a very simple scene made with blender (see file). it’s a wall with a doorway. I created collision meshes using the proper naming scheme but i can never get the meshes to import to UE4 as collisions. I’ve looked through many tutorials and answers and none works. I’m starting to think it’s a problem with unreal engine

i’ve attached both the blend and the fbx files here

I’m using version 4.8.1 of the editor under ubuntu 14.04, with blender 2.75a

2

It turns out i was naming the mesh data instead of the object data.
stupid mistake but easy to fall for i guess