AJAX custom autocomplete

See http://drupal.org/node/42552 for reference.

I have done everything (I think) but I still get a 403.

My new module is called "newmodule.module".

I have put the following in "newmodule.module":

/**
* Retrieve a pipe delimited string of autocomplete suggestions for existing plannames
*/
function newmodule_autocomplete($string) {
  $matches = array();
  $result = db_query_range("SELECT name FROM {users} WHERE LOWER(name) LIKE LOWER('%s%%')", $string, 0, 10);
  while ($user = db_fetch_object($result)) {
    $matches[$user->name] = check_plain($user->name);
  }
  print drupal_to_js($matches);
  exit();
}

and, in the newmodule_menu function:

	 $items[] = array('path' => 'newmodule/autocomplete', 'title' => t('newmodule autocomplete'),
      'callback' => 'newmodule_autocomplete', 'access' => $view_access, 'type' => MENU_CALLBACK);

Finally, I have put, in the $form['fieldset1']['field'] array:

'#autocomplete_path' => 'newmodule/autocomplete',

I get a 403 with: http://...../newmodule/autocomplete not found.

If I put that address in the address bar, indeed, it doesn't work.

However, the example in Tutorial 1 works fine (using the pre-existing user_autocomplete) in newmodule. That is, if I use:

'#autocomplete_path' => 'user/autocomplete',

My textfield autocompletes (with user names, of course) just fine.

Any guesses?