Problem to add multiple user submenus

Hi Folks,
I hope I will find help here.

I am trying to create several submenus for the “USER” top level menu at the back office (Admin page).
I was trying to re-do it following this documentation.

But only what I am getting is that my submenus a linked together (as it were one menu) and I am getting one page where the subpages are listed one under another, but not separate pages.

Here is my code :

?>
<?php
add_action('admin_menu', 'WPEUDE_menu');
function WPEUDE_menu () {
  add_submenu_page('users.php', 'Your Historical Orders', 'Purchase History', 0, __FILE__, 'WPEUDE_history');
  add_submenu_page('users.php', 'Your Address Details', 'Address Details', 0, __FILE__, 'WPEUDE_usrdet');
}
function WPEUDE_history() {
  echo '<div class="wrap">';
  include (ABSPATH.'wp-content/plugins/WP-E-UserDataExt/Puchase_History.php');
  echo '</div>';
}
function WPEUDE_usrdet() {
  echo '<div class="wrap">';
  include (ABSPATH.'wp-content/plugins/WP-E-UserDataExt/User_Details.php');
  echo '</div>';
}
?>

I don´t know where I am making a mistake, because the menu is created and the content is also displayed, but not separated as it should be.
Please help me I don´t know how further. Thank you.

(I´ve corrected the link, sorry for that)

Please Help, anyone any idea?