How to disable halo when it is already enabled via script C#

Hello there. I'm working on a scene that does only a simple thing, which is enabling the halo effect on a cube when the raycast hits it and disabling it when the raycast doesn't. This is my code:

     if (raycastForward.rayOnObject == true){

         Behaviour halo = (Behaviour)GetComponent ("Halo");
         halo.enabled = true; 
 }

     else {

         Behaviour halo = (Behaviour)GetComponent ("Halo");
         halo.enabled = false; 

for some reason, the halo is enabled when it look at it but it doesn't disable when I look away. Any help please? Thank you.