My vehicle's wheels are not being animated...?

Hello all;

I’ve been busy trying to get a vehicle exported to UE4. I was still on 4.4 when I exported a model using the default vehicle template. I had a working export using the blueprints from the ‘sedan’. The wheels were properly working and animated.
Right now I’m using UE 4.5 and exported a new vehicle. It’s been exported the same way as before, but now the wheels aren’t animated.

I’m not sure where things went wrong. How do I get this working again?

Thanks in advance!