Can't detect collision.

I have a problem with collision detection. I have my character, he is moving to the z axis automatically. I have some columns and i want to detect collision with the character...but nothing happens.

Character Movement Script(JS):

 function speed_up(){
     for(var i = 0; i  < 200; i++){
         yield WaitForSeconds (10);
         if(speed < 9){
             speed = speed + 0.3 ;
             InvokeRepeating("speed_up", 0, 2);
             can_speed = false;}else{return;}
     }
 }

Collision Script:

 function OnCollisionEnter(collision: Collision) {
     Debug.Log("LOST");
     if (collision.gameObject.tag == "Block"){
         DefeatText.active = true;
         Time.timeScale = 0;
         Debug.Log("LOST");
     }
 }

The Column :

The Character :

TRIED ALSO WITH RIGIDBODY Nothing Happened

Thank you so much for your time!