2D collider is not working on instantiated gameobjects.

Hello everyone , i am trying to make 2D platformer game with unity and i created 2 scripts called Shoot and Frostbolt. So when player clicks to mouse left button shoot script creating a instance of frostbolt. I have added 2D Box collider and rigidbody2D to my frostbolt game object but somehow frostbolt did not colliding with other gameobjects after instantie. Here is my scripts.

 using UnityEngine;
 using System.Collections;
 
 public class Shoot : MonoBehaviour {
 
     public GameObject Projectile;
     public GameObject FirePoint;
 
     float BoltEffect = 0;
     public float BoltSpawnRate = 10;
 
     void Update() {
 
         Shooting ();
 
     }
 
     void Shooting() {
 
         if (Input.GetButtonDown ("Fire1")) {
             if (Time.time >= BoltEffect) {
                 // Instantie goes here...
                 Instantiate (Projectile, FirePoint.transform.position, Projectile.transform.rotation);
                 BoltEffect = Time.time + 1 / BoltSpawnRate;
             }
 
         }
 
     }
         
 }



 using UnityEngine;
 using System.Collections;
 
 public class Frostbolt : MonoBehaviour {
 
     private int BoltSpeed = 10;
 
     void Start() {
 
     
     }
 
     void Update() {
 
         Move ();
         DestroyByTime ();
 
     }
 
     void Move() {
 
         transform.Translate (Vector3.right * Time.deltaTime * BoltSpeed);
 
     }
 
     void DestroyByTime() {
 
         Destroy (this.gameObject, 1);
 
     }
 
     void OnCollisionEnter2D(Collision2D Coll) {
 
         if (Coll.gameObject.tag == "Player") {
 
             Debug.Log ("I hit the world");
 
         }
 
     }
 }