Why does my player not move?

I have a script that i think is correct but when i attach it to my player nothing happens. Can someone please help me?

This is my script

 public float speed; 

 private Rigidbody2D rb;
 private Vector2 moveVelocity; 

 void Start(){

     rb = GetComponent<Rigidbody2D>();        
 }

 void Update(){

     Vector2 moveInput = new Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
     moveVelocity = moveInput.normalized * speed;
 }


 void FixedUdate(){

     rb.MovePosition(rb.position + moveVelocity * Time.fixedDeltaTime);        
 }

}