What is wrong with this collision script?

I am trying to detect when two planes (tagged as "Room") are colliding/intersecting when created, and then restarting the level if they do. Is there anything wrong with this script, or is there a problem with planes intersecting in unity?

function OnCollisionEnter (other : Collision){

     if (other.gameObject.tag == "Room"){
     
         print("Room Collision");
         
         Application.LoadLevel("Level");
         
         };
         
     };