Problem creating the colliders in the object

[Blaskacorp 0]

Hi guys,

 

I'm learning how to import the models into Workbench by following the wiki and Puddy300's knowledge on youtube, but it's still not colliding.
I used a cube to try to learn as simply as possible.

 

NOTE: The objects shared on the FBX Import wiki break when imported into Workbench.

 

I created this video demonstrating what I'm doing: