drupal module_hook problem (See related posts)

// does not work

function testmodule_menu($may_cache) {
  if ($may_cache) {
    $items = array();
    $items[] = array(
      'path' => 'node/12',
      'title' => t('Testing 123'),
      'callback' => 'do_it',
      'access' => TRUE,
      'type' => MENU_CALLBACK);
    return $items;
  }
}

// works

function testmodule_menu($may_cache) {
  if ($may_cache) {
    $items = array();
    $items[] = array(
      'path' => 'nodenode/12',
      'title' => t('Testing 123'),
      'callback' => 'do_it',
      'access' => TRUE,
      'type' => MENU_CALLBACK);
    return $items;
  }
}