Bullet isn't moving forward

var weapon : Transform;
var tranq : GameObject;
var bullet : GameObject;
var Speed : int = 5000;
var fwd;

function Start(){
 fwd = transform.TransformDirection(Vector3.forward);
 }
function Update () {
transform.position = weapon.TransformPoint(Vector3.zero);
transform.forward = weapon.TransformDirection(Vector3.forward);
}

function ShootTranq(){
var tranqClone = Instantiate(tranq, transform.position, transform.rotation);
		tranqClone.rigidbody.AddRelativeForce(fwd * Speed , ForceMode.Impulse);


}

The bullet gets instantiated but it never moves? How do I fix this?

Fixed it. Switched some settings on the rigidbody. IsKinematic and gravity