ESP8266 - Uncaught Error: Field or method does not already exist, and can't create it on undefined

Hello, I'm trying on ESP8266 Wifi Module. I have recompiled Espruino as described
here: http://forum.espruino.com/conversations/258825/ and here : https://github.com/espruino/Espruino

And installed it to my STM32F4DISCOVERY Device.

I'm trying those instructions : http://www.espruino.com/ESP8266

I have done all connections except of 3.3v extra regulator.
Also, I don't know is my module new or not, I can see a led like element on the board but it is not blinking when I power it up.

I'm trying this code and getting the error shown below, How can I be sure is it about module? Connection? or Sotware? :

Serial4.setup(115200, { rx: C11, tx : C10 });
var wifi = require("ESP8266").connect(Serial4, function() {
  wifi.connect("WiFi_Name","WPA2_Key", function() {
    console.log("Waiting 10 secs for connect...");
    setTimeout(function() {
      require("http").get("http://192.168.1.50", function(res) {

      });
    }, 10000);
  });
});

Uncaught Error: Field or method does not already exist, and can't
create it on undefined at line 10 col 2 }); ^ at line 2 col 7
wifi.connect("Wiffi","WiffiPassword", function() {

   ^ in function called from system