Own Plugin problem with the add_submenu_page

Hi,
I got problem with adding subpages. My class looks like this

<?php
class ProductCatalogue {
 function AdminCategories(){...}
 function AdminPhotos() {...}
 function AdminSettings() {...}
 function AdminProducts() {...}
 function AdminMain() {...}
}
?>

Ouside of class i got:

$pc_plugin = new ProductCatalogue();
function ProductCatalogue_ap() {
 global $pc_plugin;
 if (!isset($pc_plugin)) {
  return;
 }//ENDIF
 if (function_exists('add_menu_page')) {
  add_menu_page('Product Catalogue', 'Product Catalogue', 9,__FILE__, array(&$pc_plugin, 'AdminMain'));
  add_submenu_page(__FILE__, 'Categories', 'Categories', 9, __FILE__, array(&$pc_plugin, 'AdminCategories'));
  add_submenu_page(__FILE__, 'Products', 'Products', 9, __FILE__, array(&$pc_plugin, 'AdminProducts'));
  add_submenu_page(__FILE__, 'Photos', 'Photos', 9, __FILE__, array(&$pc_plugin, 'AdminPhotos'));
  add_submenu_page(__FILE__, 'Settings', 'Settings', 9, __FILE__, array(&$pc_plugin, 'AdminSettings'));
  }//ENDIF
}
 add_action('admin_menu', 'ProductCatalogue_ap');

The problem is:
function add_submenu_page() with reference to my class and method array(&$pc_plugin, ‘AdminSettings’) adds sub page but still the content of the subpage is from add_menu_page().
What goes wrong with mine code.

Thx,
mGz