6 wheeled vehicle won't move

link textHi,

I am unable to make a bus move in UE4. I set the throttle in the Event BeginPlay but the bus just stands still.
Does anybode know what the problem could be?

I have created a blueprint and set 6 wheels to the name of the bones of the mesh, but no luck.
The FBX can be found attached.

Thanks for any help or guidance!

Same problem, only a tank with 18 wheels