WaitForSeconds load level delay not working

Hi, I've been trying to get a delay of a few seconds before the bonus level of my game loads, once the character has collected all five 'cans. I've tested all aspects of the code (left most of this in the comments) but I can't get the WaitForSeconds to do anything...I'm obviously doing something wrong, and would appreciate any help :)

TIA

using UnityEngine; using System.Collections;

public class JerryCan : MonoBehaviour {

 //creating a floating-point public variable with a value of 100
 public float rotationSpeed = 100.0f;
 public GUIText textHints;

 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
     //rotates the object
     transform.Rotate (new Vector3 (0, rotationSpeed * Time.deltaTime, 0));
 }
 
 //OnTriggerEnter collision function
 void OnTriggerEnter(Collider col){
     //if the object tagged 'Player' collides with the Can, then send a message to the CanPickup function and destroy the Can.
     if (Inventory.charge < 2) {
                 col.gameObject.SendMessage ("CanPickup");
                 textHints.SendMessage("ShowHint", "Can collected!");
                 Debug.Log("Inventory = " + Inventory.charge);
                 //Debug.Log("Inventory = " + GameObject.FindGameObjectsWithTag("can").Length);
                 Destroy(gameObject);
         }

     if (Inventory.charge == 2){ //(GameObject.FindGameObjectsWithTag("can").Length == 1){
         col.gameObject.SendMessage ("CanPickup");
         textHints.SendMessage("ShowHint", "You've found all the cans! Yeay!");
         Debug.Log("should be waiting now");
         //Application.LoadLevel("menu");
         StartCoroutine("LoadAfterDelay");
     }
 }

 IEnumerator LoadAfterDelay() {
     Debug.Log("did we wait?");
     yield return new WaitForSeconds(2);
     Debug.Log("waited!");
     //textHints.SendMessage("ShowHint", "Waited 4 seconds");
     //Application.LoadLevel("menu");
     //Destroy (gameObject);
 }

}