GUI.Label error.

Hello one and all!

I have started again with my enemy AI and Health script.

I'm trying to use GUI's (such as GUI.Label) to create a visual enemy health, however I always get the error of:

Assets/EnemyAI.js(41,26): BCE0023: No appropriate version of 'UnityEngine.GUI.Label' for the argument list '(UnityEngine.Rect, System.Type)' was found.

I was wondering why this is happening?

Here is my script:

 var health = 10;
 var TakeDamage : boolean = false;
 var fullhealth = Texture;
 
 function OnTriggerEnter(other : Collider)
 {
     if(other.tag == "Player")
     {
         TakeDamage = true;
     }
 }
 
 function OnTriggerExit(other : Collider)
 {
     if(other.tag == "Player")
     {
         TakeDamage = false;
     }
 }
 
 function Update()
 {
     if(TakeDamage)
     {
         if(Input.GetButtonDown("Fire1"))
         {
             health -= 1;
         }
     }
     if(health <= 0)
     {
         health = 0;
         Destroy(gameObject);
         Debug.Log("Enemy is dead!");
     }
 }
 
 function OnGUI () {
     if(health >= 10)
     {
         GUI.Label(Rect(10,40,100,100),fullhealth);
     }
 }

So basically if the health is equal to or more than 10, it will display the fullhealth texture.

Thanks in advance!