Bug 2D collider made through script doesn't detect other 2D colliders

Hi, I created a box collider between two points A and B. When another collider (enemy) enter my created collider it has to be destroyed but it doesn´t get destroyed. In fact, it doesn't even get registered that both game Object had collided.





This is how I created the 2d box collider:

Code (CSharp):

1. public void addColliderToLine()
2.     {
3.         BoxCollider col = new GameObject("Collider").AddComponent<BoxCollider>();
4.         col.transform.parent = line.transform; // Collider is added as child object of line
5.         col.gameObject.tag = "Laser";
6.         col.isTrigger = true;
7.         // Following lines calculate the angle between startPos and endPos
8.         float angle = (Mathf.Abs(startPos.position.y - endPos.position.y) / Mathf.Abs(startPos.position.x - endPos.position.x));
9.         if ((startPos.position.y < endPos.position.y && startPos.position.x > endPos.position.x) || (endPos.position.y < startPos.position.y && endPos.position.x > startPos.position.x))
10.         {
11.             angle *= -1;
12.         }
13.         angle = Mathf.Rad2Deg * Mathf.Atan(angle);
14.         col.transform.Rotate(0, 0, angle);
15.         float lineLength = Vector3.Distance(startPos.position, endPos.position); // length of line
16.         col.size = new Vector3(lineLength, 0.1f, 1f); // size of collider is set where X is length of line, Y is width of line, Z will be set as per requirement
17.         Vector3 midPoint = (startPos.position + endPos.position) / 2;
18.         col.transform.position = midPoint; // setting position of collider object
19.     }

And in my enemy script I have something like this:

Code (CSharp):

1.     private void OnTriggerEnter2D(Collider2D collision)
2.     {
3.         if (collision.CompareTag("Laser"))
4.         {
5.             Destroy(gameObject);
6.         }
7.     }

The tags are in order and enemy has it's respective rigidBody.

 

you didnt make a boxcollider2d

 

Maybe you should also make sure the collision doesn't happen before the collider has been created.