Load Level Script has stopped working

In my game there is a loading screen that uses a PlayerPref to either load the tutorial or the title screen, depending on if it is your first play. It was working fine, until I added a new scene in the build setting before it, and now it's stopped completley. Any ideas? Here the code if it helps:

 #pragma strict
 var newskin : GUISkin;
 function Start()
 {
    yield WaitForSeconds(3);
 if(PlayerPrefs.HasKey("savedLevel")){
    // there is a saved level, load that one
    Application.LoadLevel(PlayerPrefs.GetInt("savedLevel"));
 }else{
    // no saved level, load the first one
    Application.LoadLevel(3);
 }
 }
 
 function OnGUI () {
 GUI.skin = newskin;
 GUI.color = Color.black;
 GUI.Label (Rect (635, 650, 500, 500), "Loading...");
 }