when i access a variable from another script, it doesn't change the variable in that script. what am i doing wrong?

what i am trying to do, is when a enemy gets hit, it gives him a random moveSpeed value. so i accessed the variable moveSpeed from the enemyAI script. when i run the game and i shoot an enemy, it does register the change as far as the debug.Log says, but when i watch the script variables in the inspector for the enemyAI script, they are not changing. what am i doing wrong?

thanks

 #pragma strict
 
 var loweredGun: Transform;    // assign to gunMount empty game object 
 var raisedGun: Transform; // aimedGun to aimGun empty game object
 var rayOrigin: Transform;
 var gun_01: GameObject;
 var gun_02: GameObject;
 
 var myScriptMoveSpeed: enemyAI; // this is the script i am accessing, in particular the var moveSpeed variable
 
 var shootAudio: AudioClip;
 var reloadAudio: AudioClip;
 var rifleShootAudio: AudioClip;
 
 var range: float = 1000;
 var force: float = 1000;
 var clip : int   = 3;
 var bulletsPerClip:int  = 6;
 var reloadTime :float  = 3.3;
 var bulletsLeft: int = 0;
 var shootTimer: float = 0;
 var shootCooler: float = 0.9;
 
 var playerHealth: int = 100;
 
 var damage: int = 10;  
 
 var reset: boolean = false;
 //var enemyAIScript: enemyAI;
 
 private var randRange: int;
 private var randMoveSpeed: float;   // this randomizes the moveSpeed between to float values
 
 function Start () 
 {
 
     bulletsLeft = bulletsPerClip;
     gun_01.active = true;
     myScriptMoveSpeed = GameObject.FindGameObjectWithTag("Zombie").gameObject.GetComponent(enemyAI);
     //enemyAIScript = gameObject.Tag("enemy");
 }
 
 function Update () 
 {
     if(shootTimer > 0)
     {
         shootTimer -= Time.deltaTime;
     }
     
     if(shootTimer < 0)
     {
         shootTimer = 0;
     }
     
     if(Input.GetKeyDown(KeyCode.X))
     {
         SwitchWeapons();
     }
     
     if(Input.GetMouseButton(0) && bulletsLeft)
     {
         if(shootTimer == 0)
         {
             
         
         PlayShootAudio();
         RayShoot();
         
         shootTimer = shootCooler;
         
         }
         
 
     }
     
 
 
     
 }
 
 function RayShoot()
 {
     var hit: RaycastHit;
     var directionRay = rayOrigin.TransformDirection(Vector3.forward);  // make sure rayOrigin is set with a game object that will point the firing line.
     Debug.DrawRay(rayOrigin.position, directionRay * range, Color.red);
     
     if(Physics.Raycast(transform.position, directionRay, hit, range))
     {
         if(hit.collider.gameObject.name == GameObject.FindWithTag("Body").gameObject.name)
         
         {
             Debug.Log("I hit the body");
             //animation.Play("hit1");
             randRange = Random.Range(1,4);
             randMoveSpeed = Random.Range(0.01,1.0);
             Debug.Log(randRange);
             if(randRange == 1)
             {
             hit.rigidbody.animation.Play("hit1");//(Random.value(hit1, hit2));//(directionRay * force, hit.point);
             hit.collider.SendMessageUpwards("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
             myScriptMoveSpeed.moveSpeed = 0;
             Debug.Log("movement is: ");
             Debug.Log(myScriptMoveSpeed.moveSpeed);
             yield WaitForSeconds(.3);
             hit.rigidbody.animation.Play("shamble");
             //GameObject.FindWithTag("Zombie").gameObject.GetComponent(enemyAI.moveSpeed);
             myScriptMoveSpeed.moveSpeed = randMoveSpeed;
             //myScriptMoveSpeed = GameObject.FindGameObjectWithTag("Zombie").gameObject.GetComponent(enemyAI);
             Debug.Log("movement is now: ");
             Debug.Log(myScriptMoveSpeed.moveSpeed);
             
             
             }
             else if(randRange == 2)
             {
                     hit.rigidbody.animation.Play("hit2");//(Random.value(hit1, hit2));//(directionRay * force, hit.point);
                     hit.collider.SendMessageUpwards("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
                     myScriptMoveSpeed.moveSpeed = 0;
                     Debug.Log("movement is: ");
                     Debug.Log(myScriptMoveSpeed.moveSpeed);
                     yield WaitForSeconds(.3);
                     hit.rigidbody.animation.Play("shamble");
                     myScriptMoveSpeed.moveSpeed = randMoveSpeed;
                     Debug.Log("movement is now: ");
                     Debug.Log(myScriptMoveSpeed.moveSpeed);
             
                     
             }
             
             else if(randRange == 3)// this is the fall animation 
             {
                     hit.rigidbody.animation.Play("fallBack");//(Random.value(hit1, hit2));//(directionRay * force, hit.point);
                     hit.collider.SendMessageUpwards("ApplyDamage", damage, SendMessageOptions.DontRequireReceiver);
                     yield WaitForSeconds(.5);
 
                     myScriptMoveSpeed.moveSpeed = 0;
                     Debug.Log("movement is: ");
                     Debug.Log(myScriptMoveSpeed.moveSpeed);
                     yield WaitForSeconds(.5);
                     Debug.Log("now he stands up");
                     hit.rigidbody.animation.Play("standUp");
                     yield WaitForSeconds(.5);
                     myScriptMoveSpeed.moveSpeed = randMoveSpeed;
                     hit.rigidbody.animation.Play("shamble");
                     Debug.Log("movement is: ");
                     Debug.Log(myScriptMoveSpeed.moveSpeed);
                     
                     
             
                     
             }
             
 
         }
         
         else if(hit.collider.gameObject.name == GameObject.FindWithTag("HeadCollider").gameObject.name)
         {
             Debug.Log("That was a headshot");
             hit.rigidbody.animation.Play("fallBack");
             
             yield WaitForSeconds(1);
             hit.collider.SendMessageUpwards("KillParent",SendMessageOptions.DontRequireReceiver);
             
         }
 
     }
     
 
     bulletsLeft --;
     if(bulletsLeft <= 0)
     {
         bulletsLeft = 0;
         clip --;
     }
         
         if(bulletsLeft == 0)
         {
             Reload();
         }
     
     
 }
 
 function Reload()
 {
     PlayReloadAudio();
     yield WaitForSeconds(reloadTime);
     
     if(clip >0)
     {
         bulletsLeft = bulletsPerClip;
     }
 
     
 }
 
 function PlayShootAudio()
 {
     if(gun_01.active)
     {
     audio.PlayOneShot(shootAudio);
     }
     if(gun_02.active)
     {
         audio.PlayOneShot(rifleShootAudio);
     }
 }
 
 
 function PlayReloadAudio()
 {
     audio.PlayOneShot(reloadAudio);
 
 }
 
 function SwitchWeapons()
 {
     if (gun_01.active == true)
     {
         gun_01.SetActiveRecursively(false);
         gun_02.SetActiveRecursively(true);
     }
     
     else 
     {
         gun_01.SetActiveRecursively(true);
         gun_02.SetActiveRecursively(false);
     }
 }