Saving boolean values using PlayerPrefs

I can't get my "riflepickup" boolean value to save/load using PlayerPrefs

could someone please take a look at my script and see if they can figure out the source of the problem? I really need help as I am completely clueless

cheers

 #pragma strict
 var player : Transform;
 var x : float;
 var y : float;
 var z : float;
 var riflepickup : boolean;
 
 
 function Start () {
 var weaponobj = GameObject.Find("shooting reference");
 var weapon = weaponobj.GetComponent(weaponscript);
  
  //if(PlayerPrefs.HasKey("x") && PlayerPrefs.HasKey("y") && PlayerPrefs.HasKey("z") ) {
  
  //load player position
  
  x = PlayerPrefs.GetFloat("x");
  y = PlayerPrefs.GetFloat("y");
  z = PlayerPrefs.GetFloat("z");
  
  
  
  player.position.x = x;
  player.position.y = y;
  player.position.z = z;
  
  //load rifle pickup true/false
  
  riflepickup = PlayerPrefs.GetInt("riflepickup") > 0;
  
  
  
  //}
 }
  
 function OnTriggerEnter (col: Collider) {
 var weaponobj = GameObject.Find("shooting reference");
 var weapon = weaponobj.GetComponent(weaponscript);
  
  if(col.tag == "Player")
  {
   
   riflepickup = weapon.riflepickup;
   PlayerPrefs.SetInt("riflepickup", weapon.riflepickup ? 1:0);
   PlayerPrefs.Save();
   
   x = player.position.x;
   PlayerPrefs.SetFloat("x", x);
  
   y = player.position.y;
   PlayerPrefs.SetFloat("y", y);
  
   z = player.position.z;
   PlayerPrefs.SetFloat("z", z);
   Debug.Log ("saved");
   }
  
 }