Superfish themable hooks not getting called According to superfish.module these following theme hooks are available.

 function theme_superfish($variables) {

    function theme_superfish_build($variables) {

    function theme_superfish_menu_item($variables) {

    function theme_superfish_menu_item_link($variables) {


but for some reason using these in my template.php only theme_superfish is getting called.  

function nph_superfish($variables){
 dpm("nph_superfish");

        dpm($variables);

  return "HTML";
}


works

function nph_superfish_menu_item_link($variables) {
dpm("theme_superfish_menu_item_link");
      $menu_item = $variables['menu_item'];
      $link_options = $variables['link_options'];
      return l($menu_item['link']['title'], $menu_item['link']['href'], $link_options);
    }


doesn't work

This post is probably the most comprehensive to answer the question for what I am trying to achieve (I want to add classes to menu items based on the title).  Any ideas what might be happening?

UPDATE:

I just noticed a setting on the settings page, not mentioned in any of the answers I found around the web....



UPDATE: I've  just noticed it says Default:enabled ..., so by checking it I'm disabling it...
As in my image 

Make sure these are checked or the theme hooks wont work, and they need to be checked even though, it says default:enabled.