problemi con hook_menu

<?php
function mycron_menu() {
    $items['admin/settings/mycron'] = array(
      'title' => t('mycron'),
      'description' => t('Eleborazione programmata di funzioni.'),
      'page callback' => 'drupal_get_form',
      'page arguments' => array('mycron_admin'),
      'access arguments' => array('administer site configuration'),
    );
    $items['admin/settings/mycron/new'] = array(
      'title' => t('insert new job'),
      'weight'=> 0,
      'type' => MENU_DEFAULT_LOCAL_TASK,
     );
    $items['admin/settings/mycron/edit'] = array(
      'title' => t('edit jobs'),
      'page callback' => 'drupal_get_form',
      'page arguments' => array('mycron_admin2'),
      'access arguments' => array('administer site configuration'),
      'weight' => 1,
      'type' => MENU_LOCAL_TASK,
     );
    return $items;
}
//...
function mycron_admin() {
    drupal_add_js(drupal_get_path('module', 'mycron') .'/timestamp.js', 'module');
    drupal_add_css(drupal_get_path('module', 'mycron') .'/mycron.css', 'module');
    return mycron_new_form();
}
//...
function mycron_new_form() {
 $mycronDB = variable_get('mycronJOBS',array() );
 $form['arrayStructure'] = array(
  '#type' => 'fieldset',
  '#title' => t('VIEW ARRAY STRUCTURE'),
  '#description' => '<pre>'.var_export($mycronDB, true).'</pre>',
  '#collapsible' => TRUE,
  '#collapsed' => TRUE
);
 $form['function'] = array(
  '#type' => 'textfield',
  '#title' => t('Function'),
  '#default_value' => '',
  '#size' => 15,
  '#maxlength' => 40,
  '#required' => TRUE,
);
 $form['nextJob'] = array(
  '#type' => 'textfield',
  '#title' => t('Next Time Job'),
  '#default_value' => time(),
  '#size' => 25,
  '#maxlength' => 40,
  '#required' => TRUE,
  '#attributes' => array('onfocus'=>'timeToHuman("edit-nextJob","controllaTimeStamp");', 'onkeydown'=>'timeToHuman("edit-nextJob","controllaTimeStamp");'),
  '#prefix' =>'<div class="nextJobBOX">',
  '#suffix' =>'<div class="controllaTimeStampBOX" id="controllaTimeStamp"></div></div>',
);
 $form['offset'] = array(
  '#type' => 'textfield',
  '#title' => t('Time Offset'),
  '#default_value' => '',
  '#size' => 10,
  '#maxlength' => 20,
  '#required' => TRUE,
);
 $form['file'] = array(
  '#type' => 'textfield',
  '#title' => t('File Name'),
  '#default_value' => '',
  '#size' => 15,
  '#maxlength' => 40,
  '#required' => TRUE,
);
 $form['submit'] = array(
  '#type' => 'submit',
  '#value' => t('SAVE THE NEW JOB'),
);
 return $form;
}
 
?>