Colliders not interacting

Hey guys just a quick question about Colliders in my scene,

I have a simple space station tagged as "Station" with an empty game object as a child, which has a box collider marked as a trigger on it.

and a laser prefab tagged as "projectile" with an empty game object as a child, which has a capsule collider marked as trigger on it

usually this would be fine, although for some reason they are refusing to interact with each other using the following. on the Station

function OnTriggerEnter (other : Collider) { if(other.gameObject.tag == "Projectile") { Debug.Log ("Hello", gameObject); } }

and this on the laser

 function OnTriggerEnter(other : Collider)
 {
     if(other.gameObject.tag == "Station")
     {
         Explode();
         }
 }
 
 function Explode()
 {
     Instantiate(myExplosion, transform.position, Quaternion.identity);
     Destroy(gameObject);
 }

the laser flies straight through the object, and I dont understand why, when the laser interacts with everything else in the scene fine, including destroying other game objects

Thanks