I cant move the ball on the project roll a ball

Here is the script (i don’t know how to take a picture soo i just copy it).
Also tell me what i did wrong!

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 * Time.deltaTime);


in Unity everything is case sensitive, so:

void fixedupdate ()

you should change to:

void FixedUpdate ()