movement of the rigibody2d

because my code is not working I do not understand

public Rigidbody2D rb2d;
private Vector2 mov;

public float velocidad = 1000f;
public float moveHorizontal;
public float moveVertical;

void Update()
{

    //creo un vector que guarda las cordenadas vertical y horizontal
    moveHorizontal = Input.GetAxisRaw("horizontal");
    moveVertical = Input.GetAxisRaw("vertical") * velocidad;

    mov = new Vector2(moveHorizontal, moveVertical);

    //usando las cordenadas de mi vector mi objeto las deberia usar para 
    //moverse
    rb2d.velocity = mov * velocidad;

}

I'm using unity's rigibody 2d component and trying to move them from this, because my character does not move

thanks