I have the Interactive Vehicles SUV by Antareus. I followed this tutorial https://youtu.be/Q8AJ3FD2Y_0, first using a road converted to a terrain. Using the PX Toolbox, I drive forward. The SUV falls through the terrain. This happens whether Terrain Snap is off or set to follow terrain.
 Next I used an infinite plane.  The SUV drives forward, as expected.
Then, I switch back to the PhysX Engine, per the tutorial. I rewind the Timeline and press play, the recorded drive forward does not execute. The SUV just sits there.
Can anyone provide suggestions?  I have several scenes taking place in a moving vehicle and need to solve the problem. 


Thanks,
Nathan

Nathan