When add joints to wheelcollider then it is not collide with other collider

When I add wheelcollider to empty game object and also add any joint then it is not collider with terrain collider . And I create car and wheel with sprite. Two wheels sprite and two empty game object with wheelcollider are Child of car sprite. And we can add hings joint to both wheels sprite child and in this case car stay on terrain collider .But when I am adding any joint to wheelcollider then the car is not stay on terrain collider . Anyone help ! Thanks in advance!