Fast object on collider not working

Hello,

I got a Problem with Fast Objects (ie. a Bullet) hitting a collider (crate or anything). I got this fix for the problem

http://www.unifycommunity.com/wiki/index.php?title=DontGoThroughThings

But its not working completly. It is now always hitting the box, but the hit effect (little explosion) is on a somewhere completly wrong postion, and I dont know how to fix that.

This is my script for the collision:

     var deto : Transform;
 
 function OnCollisionEnter(collision: Collision)
 
 {
 
     if (collision.gameObject.tag == "SteelBox") {
 
       var detonate = Instantiate(deto, transform.position, Quaternion.identity);
 // If I change it to           var detonate = Instantiate(deto, transform.position, Quaternion.identity);
 // It will hit but it looks like its detonating inside of the box.. so no solution -_-
   Debug.Log("hit");
 
     Destroy(gameObject,0);
 
   }
 }

This is the script for my shot:

 public var bulletMesh : Transform;
 public var bulletSpeed : float=1000;
 public var delay : int = 10;
 function Update () 
 {
     delay--;
     if (delay < 1) {
     if(Input.GetButton("Fire1")) 
     {
         if(!bulletMesh || !bulletSpeed) 
         {
             Debug.Log("[Shoot] 'bulletMesh' or 'bulletSpeed' is undefinied");
         }
         else
         {
         var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         
         var bulletCreate = Instantiate(bulletMesh, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity);
         bulletCreate.rigidbody.AddForce(transform.forward * bulletSpeed);
         }
     delay = 10;
     }
     }
 }

I hope someone knows where the problem lies :/ Thanks in advance