Help with meshes/models - Java-Gaming.org

I'm about to go crazy with this code. I load the mesh/model from a 3ds file with a proper loader and I put it to render but nothing appears. Here is the code:

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package teste;
import com.sun.j3d.loaders.*;
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.utils.geometry.Text2D;
import javax.swing.*;
import javax.media.j3d.*;
import com.sun.j3d.utils.universe.*;
import java.awt.*;
import java.io.*;
import javax.vecmath.*;
import ncsa.j3d.*;
import ncsa.j3d.loaders.*;
/**
 *
 * @author ramon
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception{
        JFrame frame = new JFrame("Teste Java3D");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(640, 480);
        frame.setResizable(false);
        GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
        Canvas3D canvas = new Canvas3D(config);
        SimpleUniverse universe = new SimpleUniverse(canvas);
        BranchGroup group = new BranchGroup();
        final int BOUNDSIZE = 100;
        BoundingSphere bounds = new BoundingSphere(new Point3d(0,0,0), BOUNDSIZE);
        Scene s = null;
        ModelLoader map = new ModelLoader();
        try {
            s = map.load("/home/ramon/data/models/Coolrobo.3ds");
        }
        catch(Exception e) {
            e.printStackTrace();
        }
        BranchGroup gr = s.getSceneGroup();
        gr.setBounds(bounds);
        TransformGroup tg = new TransformGroup();
        tg.addChild(gr);
        Switch sw = new Switch();
        sw.addChild(tg);
        sw.setCapability(Switch.ALLOW_SWITCH_WRITE);
        sw.setWhichChild( Switch.CHILD_ALL );
        group.addChild(sw);
        group.compile();
        universe.getViewingPlatform().setNominalViewingTransform();
        universe.addBranchGraph(group);
        frame.add(canvas);
        frame.setVisible(true);
    }

}

Text3D works finely, Text2D also, the primitives as well, my only problem is with the mesh/model.
Please someone give me some help!!

P.S.: My problem is that I can't see the mesh rendered! It's not the API, other program(not written by me) works finely with the very same mesh. It's not the lib. I don't know what is!