Rigidbody2D.AddForce is not moving the object

I'm trying to make a projectile move using its Rigidbody. I've looked at quite a few responses on t$$anonymous$$s forum, but no matter what I try, the projectile does not move. I've tried Vector3.forward force and transfrom.right force, neither one works. Also, I've tried setting force to as $$anonymous$$gh as 1000, again, with no luck. Any help is appreciated.

using UnityEngine; using System.Collections;

public class Fire : MonoBehaviour {

 public float force;
 public GameObject projectile;
 public GameObject RocketLauncher;

 //Use t$$anonymous$$s for initialization
 void Start () {
     projectile.transform.rotation = new Quaternion(RocketLauncher.transform.rotation.x,RocketLauncher.transform.rotation.y,RocketLauncher.transform.rotation.z-90,RocketLauncher.transform.rotation.w);
 }
 
 //Update is called once per frame
 void Update () {
     if (Input.GetKeyDown("space")) {
         projectile.GetComponent<Rigidbody2D>().AddForce(transform.right * force);
     }

 }

}