Physijs object goes through concaveMesh - three.js

Question

I've a problem that seems to be known: my "bounding" object doesn't collide with "floor" concaveMesh.
I already read that this issue could be caused by an error in scaling concaveMesh together with the model, so I exported my floor model scaled as I need it and after I applied a concaveMesh (as follow) but it doesn't work.
I red this: https://github.com/chandlerprall/Physijs/issues/102 and a lot of other things about this topic (Physijs Load model three.js collisions don't work and a similar) and I made the following code but nothing to do :(
I really don't understand why "bounding" goes through the floor.
Here my code:
Physijs.scripts.worker = './libs/chandlerprall-Physijs-7e3837b/physijs_worker.js';
Physijs.scripts.ammo = './examples/js/ammo.js';
var gravityVector = new THREE.Vector3( 0, -100, 0 );
//renderer
var renderer = new THREE.WebGLRenderer({antialias:true});
renderer.setClearColor(0xffffff, 0);
renderer.setSize( window.innerWidth, window.innerHeight );
//canvas
var canvas = renderer.domElement;
canvas.setAttribute("width", window.innerWidth);
canvas.setAttribute("height", window.innerHeight);
document.body.appendChild( canvas );
var perspectiveCamera = new THREE.PerspectiveCamera(45,window.innerWidth/window.innerHeight, 1, 200000);
//scene
var rttScene = new Physijs.Scene();
var bounding = new Physijs.SphereMesh(new THREE.SphereGeometry(100, 100, 100),
Physijs.createMaterial(
new THREE.MeshBasicMaterial({color: '#ff0000'}),
1.0, // friction
0.0 // restitution
),50 //mass
);
bounding.position.set(200,1200,-5000);
loader.load("http://0.0.0.0:8000/Models/Isola/pavimento.js", function( geometry, materials){
var groundMaterial = Physijs.createMaterial(new THREE.MeshFaceMaterial(materials),
0.8, // friction
0.2 // restitution
);
floor = new Physijs.ConcaveMesh(geometry,groundMaterial,0);
floor.name = "pavimento";
rttScene.add(floor);
initScene();
render();
});
function initScene() {
rttScene.setGravity(gravityVector);
rttScene.add(envModel);
rttScene.add(bounding);
bounding.setAngularFactor(new THREE.Vector3(0, 0, 0));
bounding.setCcdMotionThreshold( 0.1 );
bounding.setCcdSweptSphereRadius( 1 );
var ambientLight = new THREE.AmbientLight(0xD9B775 );
rttScene.add(ambientLight);
var directionalLight = new THREE.DirectionalLight(0xc7af81);
directionalLight.target.position.copy( rttScene.position );
directionalLight.position.set(-550,1950,1950).normalize();
directionalLight.intensity = 0.7;
rttScene.add(directionalLight);
perspectiveCamera.position.set(200,1200,-3000);
perspectiveCamera.lookAt(bounding.position);
}
function render() {
requestAnimationFrame(render);
renderer.clear();
rttScene.simulate();
renderer.render(rttScene, perspectiveCamera);
}
I also tried this into render() function:
var originPoint = bounding.position.clone();
var ray = new THREE.Raycaster(originPoint, new THREE.Vector3(0, -1, 0));
var collisionResults = ray.intersectObjects(rttScene.children)
if (collisionResults.length > 0) {
console.log(collisionResults[0].distance);
}
In console i can read the distance between "bounding" and "floor". This should mean that floor exist as a collider but it doesn't stop bounding from falling. Why?