Problem with Nifty GUI - interactOnClick no work

I have this code and run ok but when I do click in a button not call to any method … how can I fix it?

[package mygame;

import com.jme3.app.SimpleApplication;
import com.jme3.material.Material;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.niftygui.NiftyJmeDisplay;
import com.jme3.renderer.RenderManager;
import com.jme3.scene.Geometry;
import com.jme3.scene.shape.Box;
import de.lessvoid.nifty.Nifty;
import de.lessvoid.nifty.builder.EffectBuilder;
import de.lessvoid.nifty.builder.ImageBuilder;
import de.lessvoid.nifty.builder.LayerBuilder;
import de.lessvoid.nifty.builder.PanelBuilder;
import de.lessvoid.nifty.builder.ScreenBuilder;
import de.lessvoid.nifty.controls.button.builder.ButtonBuilder;
import de.lessvoid.nifty.screen.DefaultScreenController;
import de.lessvoid.nifty.screen.Screen;
import de.lessvoid.nifty.screen.ScreenController;

/**

  • test

  • @author normenhansen
    */
    public class Main extends SimpleApplication implements ScreenController{

    public static void main(String[] args) {
    Main app = new Main();
    app.start();
    }
    Nifty nifty ;
    @Override
    public void simpleInitApp() {
    setDisplayFps(false);
    setDisplayStatView(false);
    Box b = new Box(Vector3f.ZERO, 1, 1, 1);
    Geometry geom = new Geometry(“Box”, b);

     Material mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
     mat.setColor("Color", ColorRGBA.Blue);
     geom.setMaterial(mat);
    
     rootNode.attachChild(geom);
     
     /**
    
    • Nifty-JME integration
      */
      NiftyJmeDisplay niftyDisplay = new NiftyJmeDisplay(
      assetManager, inputManager, audioRenderer, guiViewPort);
      nifty = niftyDisplay.getNifty();
      guiViewPort.addProcessor(niftyDisplay);
      flyCam.setDragToRotate(true);

    /**

    • nifty demo code
      */
      nifty.loadStyleFile(“nifty-default-styles.xml”);
      nifty.loadControlFile(“nifty-default-controls.xml”);

    Intro(nifty);
    Menu(nifty);
    nifty.gotoScreen(“start”);

    }

private static Screen Intro(final Nifty nifty) {
Screen screen = new ScreenBuilder(“start”) {
{
controller(new DefaultScreenController() {

      @Override
     public void onStartScreen() {
        nifty.gotoScreen("menu");
      }
    });   
               
                // <layer>
    layer(new LayerBuilder("Layer_ID") {{

        alignCenter();
                valignCenter();
                childLayoutOverlay();
                width("800px");
                height("600px");

        // <panel>
        panel(new PanelBuilder("Panel_ID") {{
            alignCenter();
                valignCenter();
                childLayoutOverlay();
                width("256px");
                height("256px");
                onStartScreenEffect(new EffectBuilder("") {

                  {
                    length(250);
                    startDelay(1300);
                    inherit();
                    effectParameter("global", "false");
                    effectParameter("distance", "10.");
                  }
                });
               
            image(new ImageBuilder() {

                  {
                    filename("Interface/jmelogo.png");
                    onStartScreenEffect(new EffectBuilder("") {

                      {
                        length(1000);
                        startDelay(100);
                        timeType("exp");
                        effectParameter("factor", "6.f");
                        effectParameter("mode", "in");
                        effectParameter("direction", "right");
                      }
                    });
                  }
                }); 
           
        }});
        // </panel>
         // <panel>
       panel(new PanelBuilder("Panel_ID") {{
            alignCenter();
                valignCenter();
                childLayoutOverlay();
                width("256px");
                height("256px");
                onStartScreenEffect(new EffectBuilder("") {

                  {
                    length(250);
                    startDelay(1300);
                    inherit();
                    effectParameter("global", "false");
                    effectParameter("distance", "10.");
                  }
                });
                
            image(new ImageBuilder() {

                  {
                    filename("Interface/blenderlogo.jpg");
                    onStartScreenEffect(new EffectBuilder("move") {

                      {
                        length(1000);
                        startDelay(1000);
                        timeType("exp");
                        effectParameter("factor", "6.f");
                        effectParameter("mode", "in");
                        effectParameter("direction", "right");
                      }
                    });
                  }
                }); 
           
        }});
        // </panel>
         // <panel>
        panel(new PanelBuilder("Panel_ID") {{
            alignCenter();
                valignCenter();
                childLayoutOverlay();
                width("256px");
                height("256px");
                onStartScreenEffect(new EffectBuilder("shake") {

                  {
                    length(250);
                    startDelay(1300);
                    inherit();
                    effectParameter("global", "false");
                    effectParameter("distance", "10.");
                  }
                });
                onStartScreenEffect(new EffectBuilder("imageSize") {

                  {
                    length(600);
                    startDelay(4000);
                    effectParameter("startSize", "1.0");
                    effectParameter("endSize", "3.0");
                    inherit();
                    neverStopRendering(true);
                  }
                });
            image(new ImageBuilder() {

                  {
                    filename("Interface/LOGO.png");
                    onStartScreenEffect(new EffectBuilder("move") {

                      {
                        length(1500);
                        startDelay(2000);
                        timeType("exp");
                        effectParameter("factor", "6.f");
                        effectParameter("mode", "in");
                        effectParameter("direction", "right");
                      }
                    });
                  }
                }); 
           
        }});
        // </panel>
         
    }});
    // </layer>
                 
    }
  }.build(nifty);
    return screen;            

}

private static Screen Menu(final Nifty nifty) {

       Screen screen = new ScreenBuilder("menu") {
           {
               controller(new DefaultScreenController() {

     // @Override
    // public void onStartScreen() {
     //   nifty.gotoScreen("");
     // }
                    
    });   
               
                // <layer>
            layer(new LayerBuilder("layer") {

      {
        backgroundImage("Interface/Banner2013.png");
        childLayoutVertical();
       // panel(new PanelBuilder("dialogParent") {

         // {
           /* paddingLeft("140px");
            //paddingRight("25px");
            //backgroundColor("#000");
            padding("25px");
            childLayoutVertical();
            width("17%");
            height("7%");
            alignCenter();
            //valignCenter();*/
            
            control (new ButtonBuilder("StartButton", "Iniciar Juego"){{
              visibleToMouse(true);
              alignCenter();
              interactOnClick("iniGame()");
              
            }});
          //}
      //  });
      //  panel(new PanelBuilder("dialogParent") {

          //{
            /*paddingLeft("250px");
            //paddingRight("25px");
            //backgroundColor("#fff");
            padding("-7px");
            childLayoutVertical();
            width("17%");
            height("7%");
            alignCenter();
            //valignCenter();*/
            control (new ButtonBuilder("QuitButton", "Salir"){{
              visibleToMouse(true);
              interactOnClick("quitGame()");
            }});
          //}
        //});
      }
    });
    // </layer>
                 
    }
  }.build(nifty);
    return screen;            

}
public void quitGame(){
this.stop();
}

public void iniGame(){
nifty.gotoScreen("");
}
@Override
public void simpleUpdate(float tpf) {
//TODO: add update code

}

@Override
public void simpleRender(RenderManager rm) {
    //TODO: add render code
}

public void bind(Nifty nifty, Screen screen) {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onStartScreen() {
    throw new UnsupportedOperationException("Not supported yet.");
}

public void onEndScreen() {
    throw new UnsupportedOperationException("Not supported yet.");
}

}]