admin_menu hook is not triggered

Hello there !
I have a strange problem. The admin_menu hook is triggered when i use the super-admin account, but if i use another account (from another blog, i.e. multisite installation) to log in to the admin panel, it seems as though the hook isn't triggered anymore.

add_action('admin_menu', 'remove_menu_items');
[...]
function remove_menu_items()
{
  var_dump(get_current_blog_id());
  break;
}