UnityScript, Delegates and SmoothMoves

Still learning code on my own here and I'm trying to understand delegates and how they would work in SmoothMoves.

edit Just to expand on this because this is the issue I'm having;

I'm trying to work with SmoothMoves while using UnityScript (JS). To do so, I need to work with delegates.

this is the code have, while it doesn't cough out any errors, it doesn't do what I 'think' it should.

 #pragma strict
 
 import SmoothMoves;
 
 var hitPoints                     : int     = 20;
 var cost                        : int     = 100;
 
 var tilePartner                  : GameObject;
 var tomatoSlot                    : GameObject;
 
 var placementAudio                : AudioClip;
 var myAnimation                    : SmoothMoves.BoneAnimation;
 
 private var projectileStrength    : int      = 0;
 private var soundRate             : float    = 0.0;                    
 private var soundDelay            : float = 0.0;
 var isAttacking                    : boolean = false;
 var isSpawning                    : boolean = true;
 var isIdle                        : boolean = false;
 
 function Start ()
 {
     PlaySound ( placementAudio, 0 );
 }    
 
 
 function Update ()
 {
     if ( isSpawning )
     {
         Spawn ();
     }
     if ( hitPoints <= 0 )
     {
         tilePartner.tag = "placementPlane_Open";
         Destroy ( gameObject );
     }
     if (isIdle && !isSpawning && !isAttacking)
     {
         animation.Play("Idle");
     }
     if (isAttacking && !isSpawning)
     {
         myAnimation.RegisterUserTriggerDelegate(Throw);
     }
 }
 
 function Spawn ()
 {
     animation.Play("Spawn");
     yield WaitForSeconds (.8);
     isSpawning = false;
     isIdle = true;
 }
 
 function OnTriggerEnter ( other : Collider )
 {
     if (other.gameObject.tag == "alienAttack")
     {
         projectileStrength = other.GetComponent(alienAttack).strength;
         hitPoints -= projectileStrength;
         projectileStrength = 0;
     }
 }
 
 function PlaySound (soundName : AudioClip, soundDelay : float)        // calls to play sound based on sound file name attached to object
 {
     if ( !audio.isPlaying && Time.time > soundRate )                // sets sound rate
     {
         soundRate = Time.time + soundDelay;                            // option to add a delay to the sound before it starts playing
         audio.clip = soundName;
         audio.Play ();
         yield WaitForSeconds ( audio.clip.length );
     }    
 }
 
 function Throw(userTriggerEvent : SmoothMoves.UserTriggerEvent)
 {
     animation.Play("Throw");
     if (userTriggerEvent.frame == 13)
     {
         print ("throw");
     }
 }

My issue is this part right here in the function update;

 if (isAttacking && !isSpawning)
         {
             myAnimation.RegisterUserTriggerDelegate(Throw);
         }

The code will enter this section just fine, however...it's not calling the function "Throw" which I was assuming it should. It doesn't enter the function Throw at all. It just does nothing.

Being new to delegates, I'm unsure what I'm suppose to do to properly call the Throw function?