Why is the hairworks asset is not moving with the animation in unreal?

Animations in hairworks standalone are working fine. When I import the skeletal mesh and hairworks into unreal, I parent the hairworks to the skeletal mesh and provide an animation like in the hairworks project. The animation will play but the hair does not follow. Any ideas why the hairworks asset is not moving with the animation in unreal only?

That’s odd. What about preinstalled nVidia hairwork assets, they still work in your engine build?