Fade in object using iTween

Hi - In my game I want to be able to both fade in and fade out objects, using iTween.

I've got the code working to fade objects out, but when I want to fade them in - nothing happens.

Here's the code I've got so far:

 var object : GameObject;
 
 function OnTriggerEnter(other: Collider){
 
 
 FadeIn(); 
 
 } 
 
 
 function FadeIn() {
  
         iTween.ValueTo(gameObject, iTween.Hash("from", 0f, "to", "time", 3f, "easetype", "linear", "onupdate", "setAlpha"));
             
             }

Does anyone know what I'm doing wrong?

Thanks, Laurien