Gun reload not working?

Hello all, this is my ammo script attached to the gun:

 var Bullet : Rigidbody; //The bullet prefab is a Rigid body
 var Spawn : Transform; //Where the bullet shoots from
 var BulletSpeed : float = 1000; //How fast the bullet goes
 var ReloadTime : float = 2; //How long it takes to reload
 var AmmoInMag : float = 30; //How much ammo the gun carries
 var IsFullAuto = true;
 static var AmmoLeft : float;
 private var CanFire = true;
 var FireRate = 0.1;
 
 function Start () {
     AmmoLeft = AmmoInMag;
     }
 
 function Update () {
 
     if(IsFullAuto == false){
         if(Input.GetButtonDown("Fire1")){
             if(AmmoLeft > 0){
                 Fire();
             }
         }
     }
     else{
     if(Input.GetButton("Fire1")){
             if(AmmoLeft > 0){
                 Fire();
             }
         }
     }
 
 
     
     if(AmmoLeft == 0)
     {
         Reload();
     }
     
     if(AmmoLeft < 0){
         AmmoLeft = 0;
     }
 }
 function Fire(){
     if(CanFire == true){
         var bullet1 : Rigidbody = Instantiate(Bullet,Spawn.position,Spawn.rotation);
         bullet1.AddForce(bullet1.transform.right *BulletSpeed);
         CanFire = false;
         yield WaitForSeconds(FireRate);
         CanFire = true;
         AmmoLeft -= 1;
         audio.Play();    
     }
 }
 
 
 
 function Reload(){
     CanFire = false;
     yield WaitForSeconds(ReloadTime);
     CanFire = true;
 }

I can't figure out why, but all works until it has to reload - the gun will fire but when the AmmoInMag runs out, it doesn't seem to reload.. how can I fix this?

Help is appreciated + thanks in advance.