kinematic与static刚体不会触发任何接触回调

package{
    import Box2D.Common.Math.b2Vec2;
    import Box2D.Dynamics.b2Body;
    import Box2D.Dynamics.Contacts.b2Contact;
    import Box2D.Collision.b2Manifold;
    import Box2D.Dynamics.b2ContactImpulse;
    
    public class Main extends BaseMain{
        
        
        public function Main(){
            super(new b2Vec2(0,0));
        }
        
        
        override protected function init():void{
            UIManager.getInstance().init(this);
            
            var boxA:b2Body=createBox(30,30,50,300);
            var circle:b2Body=createCircle(15,50,400);
            var boxB:b2Body=createBox(50,200,700,300);
            boxA.SetUserData({type:"boxA"});
            circle.SetUserData({type:"circle"});
            boxB.SetUserData({type:"boxB"});
            
            boxB.SetType(b2Body.b2_staticBody);
            
            boxA.SetType(b2Body.b2_kinematicBody);
            boxA.SetLinearVelocity(new b2Vec2(10,0));
            boxA.SetPreSolveCallback(preSolve);
            boxA.SetContactBeginCallback(contactBegin);
            boxA.SetContactEndCallback(contactEnd);
            boxA.SetPostSolveCallback(postSolve);
            
            circle.SetType(b2Body.b2_dynamicBody);
            circle.SetLinearVelocity(new b2Vec2(5,0));
            circle.SetPreSolveCallback(preSolve);
            circle.SetContactBeginCallback(contactBegin);
            circle.SetContactEndCallback(contactEnd);
            circle.SetPostSolveCallback(postSolve);
        }
        
        private function contactBegin(contact:b2Contact,other:b2Body):void{
            UIManager.getInstance().print("contactBegin:"+other.GetUserData().type);
        }
        
        private function contactEnd(contact:b2Contact,other:b2Body):void{
            UIManager.getInstance().print("contactEnd:"+other.GetUserData().type);
        }
        
        private function postSolve(contact:b2Contact,impulse:b2ContactImpulse,other:b2Body):void{
            UIManager.getInstance().print("postSolve:"+other.GetUserData().type);
        }
        
        private function preSolve(contact:b2Contact,oldManifold:b2Manifold,other:b2Body):void{
            UIManager.getInstance().print("preSolve:"+other.GetUserData().type);
            
        }
        
        override protected function stepBefore():void{ 
            
        }
        
        
    };
}