Butt does not bounce on 3d studio max exported animation, breasts bounce just fine.

[trepleen]

I've exported an animation from 3d studio max using 3ds-max-skeleton-controller-rig found here:

 

http://www.loverslab.com/topic/36314-3ds-max-skeleton-controller-rig-v-01-2014-09-02/page-2?do=findComment&comment=922680

 

The breasts bounce just fine on my exported animations, but the butt does not.

 

Does anyone know why and how to fix this?