Problem with OnCollisionEnter

Hi!
Im trying to catch the moment when my enemy prefab get attached on a fence (tag = "Colisiones"), with a Box Collider 2D. My Enemy has a collider too (circle collider 2d) and a rigid body 2d, so the code its on his script

void OnCollisionEnter(Collision col) {
		if (col.gameObject.tag == "Colisiones") {
			onCol = true;
		}

There are the options of my Enemy Rigidbody:

98565-captura-de-pantalla-2017-07-27-225802.png

Do you see anything?
Thanks!!

You have checked “Is Trigger” on your enemy collider, do you?

I forgot to say that this code is only a test to comprobe the method OnCollisionEnter. The problem is that this parameter “onCol” (false at the beggining of the class) dont change to “true” when the enemy hits the collider of the fence.

Can you guys know what’s the problem?

Oh, and the colliders dont have checked “Is trigger”