Load a model = impossible task

Troubleshooting graphics
1

Helloooo. Could anybody explain to me how to load a 3d object, i have investigated through all the forum, i have proved several methods, and all do "NOTHING". I am getting crazy please help me!!!.


Node loadedModel = null;      
      URL model = null;
      model = Model.class.getClassLoader().getResource(fileName);
        if(model==null)
             System.out.println("OOOOOOOOOOOOOO");
        else
           System.out.println(model);
      try {
         ResourceLocatorTool.addResourceLocator(
                 ResourceLocatorTool.TYPE_TEXTURE,
                 new SimpleResourceLocator(Model.class.getClassLoader().getResource(
                         "res/cajon/")));
      } catch (URISyntaxException e1) {
         // TODO Auto-generated catch block
         e1.printStackTrace();
      }
        FormatConverter converter = new ObjToJme();
        try {
         converter.setProperty("mtllib", new File("src/res/cajon/").toURI().toURL());
         System.out.println(converter.getProperty("mtllib"));
      } catch (MalformedURLException e1) {
         // TODO Auto-generated catch block
         e1.printStackTrace();
      }
       
       ByteArrayOutputStream BO = new ByteArrayOutputStream();
        try {
            converter.convert(model.openStream(), BO);
            loadedModel = (Node) BinaryImporter.getInstance().load(new ByteArrayInputStream(BO.toByteArray()));
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(0);
        }
        return loadedModel;