Level Start error :/

Hi… Im here newbie and im making FPS game…

I made this script…(For now im using or just trying to use singleplayer so thats why it has only aplication…)

So…This is my code:
using UnityEngine;
using System.Collections;

namespace mainMenuScript
{
public class mainMenuScript : MonoBehaviour
{
public void mainMenuSinglePlayerPlay()
{
Debug.Log(“mainMenu # Starting Singleplayer scene”);
Aplication.LoadLevel(si_test);
}

    public void mainMenuMultiPlayerPlay()
    {
        Debug.Log("mainMenu # Starting Multiplayer scene");
    }

    public void mainMenuSettings()
    {
        Debug.Log("mainMenu # Starting Settings scene");

    }

    public void mainMenuExit()
    {
        Debug.Log("mainMenu # Exit...");
        Debug.Log("Exiting game!");
    }
}

}

Console says this: Screenshot - 94f375e2b5ae49dbd8dda8e540784eec - Gyazo

In my build settings i got:

mainmenu.unity
si_test.unity (SINGLEPLAYER MAP)

Well all i can see is that Application is spelled wrong try this.

Application.LoadLevel(si_test);