BeginForm does GET instead of POST

I have a controller that has two Actions;

public ActionResult Cadastrar()
{
    return View();
}


//[ValidateAntiForgeryToken]
[HttpPost]
public ActionResult Cadastrar(Usuario usuario)
{
    if (ModelState.IsValid)
    {
        var appUsuario = new UsuarioAplicacao();
        appUsuario.Salvar(usuario);
        return RedirectToAction("Index");
    }
    return View(usuario);
}

And I have this view

@using (Html.BeginForm("Cadastrar","Usuario",FormMethod.Post)) 
{
    código código código
    <input type="submit" value="Cadastrar" class="btn_login" />
}

When I click submit on the registration page it goes to the same page sending by get the values of the form:

  

link

And when this happens it calls the register by get and the cycle repeats itself.

I can not register at all, does anyone have any tips?