Play button error

using UnityEngine;
using System.Collections;

public class PlayerMovement : MonoBehaviour {

    private Animator playerAnimator;
    private float moveHorizontal;
private float moveVertical;
    private Vector3 movement;

    // Use this for initialization
    void Start () {
        playerAnimator = GetComponent<Animator> ();
    }

    // Update is called once per frame
    void Update () {
        moveHorizontal = Input.GetAxisRaw ("Horizontal");
        moveVertical = Input.GetAxisRaw ("Vertical");

                Movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
    }
    void FixedUpdate (){
        if (movement != Vector3.zero) {
            playerAnimator.SetFloat ("Speed", 3f);
        } else {
            playerAnimator.Setfloat ("Speed", 0f);
        }
    }
}