motion blur with armature follow path

hi everyone
i use blender 2.65a 64bit

i rigged a car and used “Transformation constraint” to make wheels rotating while moving
then i animate the armature of the car with “follow path”
the car motion is working fine and i created a test video

but “motion blur” didn’t work with armature
i try to bake animation for both the car and the armature but blender stop working