WASD won't work

So I was doing the roll a ball project, and just did my code for the player movement and I tried to move with my WASD keys but I couldn’t. I looked at the input manager and my keys were WASD. I Here is my code.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : 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);
}

}
I am puzzled why this won’t work.
Any help would be helpful. :smiley:

because it’s FixedUpdate instead of fixedupdate. always camelcase.