Import FBX mesh with anims from Motionbuilder

Hi im wondering how to do this, the documentation breezily says *“The FBX animation import pipeline allows for importing both a Skeletal Mesh and animation all at once”. What happens is the thing whirs for about half an hour slowing importing then the mesh comes in upside down with no animation.

I’m wondering if the animation needs to be baked to the skeleton - it is, and if the version needs to be fbx 2013 -it is. Is there anything else???