Roll A Ball: Can't get ball to move. Did not make same error as earlier posters.

Hello, I have read through all of the similar questions and I am not making the same errors as they are, so I hope someone will treat this as a new question. The demo itself has been changed since people stared asking questions about it. I believe my code is letter for letter as shown in the demo but I don't have a practiced eye so I guess I am missing something. Based on what I read below, I have also checked over "Horizontal" and "Vertical" axes in the Input Manager.

I have successfully created past projects where I moved GameObjects using the mouse.

Here is my code:

using UnityEngine;

using System.Collections;

public class PlayerContoller : MonoBehaviour {

 public float speed;
 private Rigidbody rb;


 void Start ()
 {
     rb = GetComponent<Rigidbody>();
 }

 void FixedUpdate () 
 {
     float moveHorizontal = Input.GetAxis ("Horizontal");
     float moveVertical = Input.GetAxis ("Vertical");

     Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

     rb.AddForce (movement * speed);
 }

}

(Note I did try to set "speed" variable to different amounts in Inspector)

Can anyone tell me what I am doing wrong? Thx