Score system not working at all

Hi guys.

I tried to incorporate a simple coin based scoring system in my game using a script I found in the unity community. I have added the following script to the player object.

 #pragma strict
 
 var score = 0;
  var scoreText = "Score: 0";
  
  
  function OnTriggerEnter( other : Collider ) {
      Debug.Log("OnTriggerEnter() was called");
      if (other.tag == "Coin") {
          Debug.Log("Other object is a coin");
          score += 1;
          scoreText = "Score: " + score;
          Debug.Log("Score is now " + score);
          Destroy(other.gameObject);
          print (score);
      }
  }
  
  function OnGUI () {
      
      GUI.Label (Rect (1200, 0, 100, 50), scoreText.ToString()); 
      }

Problem is that the console doesn't register anything at all. The score remains zero even if the player object passes through the coins. The coins are not destroyed either.

I have checked the coin tag. I am using polygon collider for the player and circle collider for the coins. The coin collider is set as "is trigger" while player collider is not set so. I have tried changing collision detection settings on player as well but nothing seems to work.

Any ideas where I'm wrong?