Blender Game Engine, Problem with Scripts

Hello Everybody,
I want to start a demo of a car game using the vehicle_Constraint.
So i downloaded some demo files and tried them out.
(for examlple the one at the bottom of this page:

The problem is, Blender 2.72 (and 2.7 and 2.6) (64 bit) always crashes instantly if i press the “p” butten:spin:.
Usually the game engine works and I can execute basic python scripts.

Does anybody have an idea why the car physic script doesnt work ??