Emit data doesn't enter in .on() event with nativescript core

[MitiProject]

Hello, I'm trying to use on() function, I send and receive data, but the .on([...]) doesn't work.

I set a breakpoint on line 11, but the debbuger never stops in that line.

My code:

var app = require("application");
var platform = require("platform");
var color = require("color");
var gestures = require("ui/gestures");
var labelModule = require("ui/label");
var SocketIO = require("nativescript-socketio").SocketIO;
var socketIO = new SocketIO("http://192.168.1.9:9000", []);
var dialogs = require("ui/dialogs");

socketIO.on("send command", function(data) {
  console.log(data); // This is line 11
});
socketIO.connect();

function dialogs2() {
  dialogs
    .action({
      message: "Set up drunki",
      cancelButtonText: "Cancel",
      actions: ["Send Calibrate request"]
    })
    .then(function(r) {
      console.log(socketIO.connected);
      if (socketIO.connected === false) return;
      socketIO.emit("send command", { message: "a" }); //Line 25
      setFullScreen();
    });
}
// Event handler for Page "loaded" event attached in main-page.xml
function pageLoaded(args) {
  if (app.android && platform.device.sdkVersion >= "21") setFullScreen();
}

function setFullScreen() {
  var View = android.view.View;
  var window = app.android.startActivity.getWindow();
  window.setStatusBarColor(0x000000);
  var decorView = window.getDecorView();
  decorView.setSystemUiVisibility(
    View.SYSTEM_UI_FLAG_LAYOUT_STABLE |
    View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
    View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | // hide nav bar
    View.SYSTEM_UI_FLAG_FULLSCREEN | // hide status bar
      View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
  );
}

// Exports
exports.pageLoaded = pageLoaded;
exports.dialogs = dialogs2;