Forum - Craft Animations - 3d animation tools

please help me guys, ihave a problem in the craft animation that after doing my work in any kides of cars ( 2WE , 4WE ) and save it when i come back to it ( open the max file ) and i start recording, the car fall as afree fall i do the best to know where is the problem but ididnt know (( the problem is not in the gravity ))

Try to uncheck the "Use Fast Ray Cast" from the "Ray Cast Properties" in the 4-Wheelers configuration.