ID not recognized in function

In my quest script I want it to identify objects by their type and ID. I have a var setup as the objects ID that canbe changed in the Inspector and inside of function update I have it assign the specified object by its specified type and then whatever the quest's ID is.

so... var ID = "001"; var Object : GameObject;

 function Update(){
     Object = GameObject.Find("A"+ID);
     if(Object.active == true){
         print("you have your object");
     }
 }

the problem is that Object is returned null in the debug log and I'm not sure why. When I set the ID within the script it works fine. When I make the in function ID equal the first ID it returns null. help?