I have a big problem with three.js:

I want a simple cube with a different color on each face. I have tried this way:

// set the scene size

    var WIDTH = jQuery('#showcase').width() - 20, HEIGHT = jQuery('#showcase').height();



    // set some camera attributes

    var VIEW_ANGLE = 45, ASPECT = WIDTH / HEIGHT, NEAR = 0.1, FAR = 10000000;



    this.container = jQuery('#showcase');



    this.renderer = new THREE.WebGLRenderer();

    this.camera = new THREE.PerspectiveCamera(VIEW_ANGLE, ASPECT, NEAR, FAR);

    this.scene = new THREE.Scene();

    this.scene.add(this.camera);



    // camera start position

    this.camera.position.z = this.model.radius;

    this.camera.position.y = this.model.cameraY;

    this.camera.position.x = 0;

    this.camera.lookAt(this.scene.position);



    this.renderer.setSize(WIDTH, HEIGHT);

    this.container.append(this.renderer.domElement);



    //Multiple Colors

    var materials = [new THREE.MeshBasicMaterial({

        color : 0xFF0000

    }), new THREE.MeshBasicMaterial({

        color : 0x00FF00

    }), new THREE.MeshBasicMaterial({

        color : 0x0000FF

    }), new THREE.MeshBasicMaterial({

        color : 0xAA0000

    }), new THREE.MeshBasicMaterial({

        color : 0x00AA00

    }), new THREE.MeshBasicMaterial({

        color : 0x0000AA

    })];



    this.geometry = new THREE.CubeGeometry(100, 100, 100, materials);



    this.mesh = new THREE.Mesh(this.geometry,  new THREE.MeshFaceMaterial());



    this.scene.add(this.mesh);



    // create a point light

    this.pointLight = new THREE.PointLight(0xFFFFFF);

    this.pointLight.position = this.scene.position;

    this.scene.add(this.pointLight);



    this.renderer.render(this.scene, this.camera);

But I get this error message:
Uncaught TypeError: Cannot read property 'map' of undefined from line 19152 in three.js.

To me it seems to be a problem of the webgl renderer. In most topics I have found here and somewhere else, they were using the canvas renderer. But I want to stay with the webgl renderer.

Does anyone know something about this problem?
Thanks a lot:-)