Level Fade Help!

Oh wow, this is exactly what I want! I happened to pass by this thread a few hours ago and gave it a go but it did not work. I mean when I click play, nothing happens (grey screen). No error though. Oh and I am using Unity Pro 3.5.6f4 by the way. Here's the script...

 using UnityEngine;
 using System.Collections;
 
 public class LevelTrigger : $$anonymous$$onoBehaviour {
 void  OnTriggerEnter ( Collider cubeTrigger  ){   
     Debug.Log ("OnTriggerEnter : cubeTrigger.tag = " + cubeTrigger.tag); // shows the tag of the trigger
     // if tag is player
     if (cubeTrigger.tag == "Player")
     {
        var firstlevel = GameObject.Find("Level1");
        Destroy(firstlevel);
        AutoFade.LoadLevelAdditiveAsync ("Level2" ,3,1,Color.black); 
     }
 }
 }    





 // AutoFade.cs
 using UnityEngine;
 using System.Collections;
  
 public class AutoFade : $$anonymous$$onoBehaviour
 {
     private static AutoFade m_Instance = null;
     private $$anonymous$$aterial m_$$anonymous$$aterial = null;
     private string m_LevelName = "";
     private int m_LevelIndex = 0;
     private bool m_Fading = false;
  
     private static AutoFade Instance
     {
         get
         {
             if (m_Instance == null)
             {
                 m_Instance = (new GameObject("AutoFade")).AddComponent<AutoFade>();
             }
             return m_Instance;
         }
     }
     public static bool Fading
     {
         get { return Instance.m_Fading; }
     }
  
     private void Awake()
     {
         DontDestroyOnLoad(this);
         m_Instance = this;
         m_$$anonymous$$aterial = new $$anonymous$$aterial("Shader \"Plane/No zTest\" { SubShader { Pass { Blend SrcAlpha One$$anonymous$$inusSrcAlpha ZWrite Off Cull Off Fog { $$anonymous$$ode Off } BindChannels { Bind \"Color\",color } } } }");
     }
  
     private void DrawQuad(Color aColor,float aAlpha)
     {
         aColor.a = aAlpha;
         m_$$anonymous$$aterial.SetPass(0);
         GL.Color(aColor);
         GL.Push$$anonymous$$atrix();
         GL.LoadOrtho();
         GL.Begin(GL.QUADS);
         GL.Vertex3(0, 0, -1);
         GL.Vertex3(0, 1, -1);
         GL.Vertex3(1, 1, -1);
         GL.Vertex3(1, 0, -1);
         GL.End();
         GL.Pop$$anonymous$$atrix();
     }
  
     private IEnumerator Fade(float aFadeOutTime, float aFadeInTime, Color aColor)
     {
         float t = 0.0f;
         while (t<1.0f)
         {
             yield return new WaitForEndOfFrame();
             t = $$anonymous$$athf.Clamp01(t + Time.deltaTime / aFadeOutTime);
             DrawQuad(aColor,t);
         }
         if (m_LevelName != "")
             Application.LoadLevelAdditiveAsync(m_LevelName);
         else
             Application.LoadLevelAdditiveAsync(m_LevelIndex);
         while (t>0.0f)
         {
             yield return new WaitForEndOfFrame();
             t = $$anonymous$$athf.Clamp01(t - Time.deltaTime / aFadeInTime);
             DrawQuad(aColor,t);
         }
         m_Fading = false;
     }
     private void StartFade(float aFadeOutTime, float aFadeInTime, Color aColor)
     {
         m_Fading = true;
         StartCoroutine(Fade(aFadeOutTime, aFadeInTime, aColor));
     }
  
     public static void LoadLevelAdditiveAsync(string aLevelName,float aFadeOutTime, float aFadeInTime, Color aColor)
     {
         if (Fading) return;
         Instance.m_LevelName = aLevelName;
         Instance.StartFade(aFadeOutTime, aFadeInTime, aColor);
     }
     public static void LoadLevelAdditiveAsync(int aLevelIndex,float aFadeOutTime, float aFadeInTime, Color aColor)
     {
         if (Fading) return;
         Instance.m_LevelName = "";
         Instance.m_LevelIndex = aLevelIndex;
         Instance.StartFade(aFadeOutTime, aFadeInTime, aColor);
     }
 }