change SCENE when the player passes

Hello everyone, I’m trying to change SCENE when the player passes by an object and it does not work. Does anyone know what the problem is?

using UnityEngine;
using System.Collections;

public class GoSceen : MonoBehaviour {
public bool alreadyPlayed = false;

void OnTriggerEnter()
{
    if (!alreadyPlayed)
    {
        Application.LoadLevel("MironSinagog");
        alreadyPlayed = true;
    }

}

}

You have to put Collider parameter -
Like this

 void OnTriggerEnter(Collider col)
 {
     if (col.collider.tag == "target" && !alreadyPlayed)
     {
         Application.LoadLevel("MironSinagog");
         alreadyPlayed = true;
     }
}