Rigidbody.AddForce Problem

Hello Guys
I have a problem with addforce… I want to Instantiate a gameobject and then move it forward and this is my code but the gameobject doesn’t move forward :
using UnityEngine;
using System.Collections;
using System.Timers;

public class CreatingBullets : MonoBehaviour {

 public GameObject MyGameObject;
 public bool Created = false;
 public float Power;

 void Update()
 if(Input.touchCount == 1)
 if(Created == false)
 Instantiate(MyGameObject, transform.position, transform.rotation);
 MyGameObject.rigidbody.AddForce(transform.forward * Power);
 Created = true;

 IEnumerator WatingVoid()
 yield return new WaitForSeconds(1);
 Created = false;

thanks a lot…

You need to add force to your instantiated object, not prefab, e.g.:

GameObject obj = Instantiate(MyGameObject, transform.position, transform.rotation) as GameObject;
obj.GetComponent<Rigidbody>().AddForce(transform.forward * Power);