btRaycast vehicle wheels sink through btBoxShapes

[charles_west]

Hello,
I've been prototyping a four wheel vehicle on a btStaticPlane and tried to switch today to a set of kinematic btBoxShapes BtRigidBody s. As far as I can tell however, the btRaycastVehicle raycasts are ignoring all of the btBoxShapes. Is there any way to make the vehicle detect the terrain?

thanks