modActiveDirectory unable to authenticate

[2014-02-10 16:49:47] (WARN @ /modx/index.php) Could not load package metadata for package activedirectory.
[2014-02-10 16:49:47] (INFO @ /modx/index.php) [ActiveDirectory] Could not authenticate user: "user@domain" with password "password".
[2014-02-10 16:49:50] (WARN @ /modx/connectors/system/errorlog.php) Could not load package metadata for package activedirectory.

/* authenticate the user */
if ($madDriver->authenticate($username,$scriptProperties['password'])) {
	$modx->log(modX::LOG_LEVEL_INFO,'[ActiveDirectory] Attempting to authenticate user');

    $user =& $scriptProperties['user'];
    $user = $modx->getObject('modActiveDirectoryUser',array('username' => $username));
    if (empty($user)) {
        $user = $modx->newObject('modActiveDirectoryUser');
        $user->set('username', $username);
        $user->set('active',true);
        $user->save();
        $profile = $modx->newObject('modUserProfile');
        $profile->set('internalKey',$user->get('id'));
        $profile->save();
        $user->Profile =& $profile;
    } else {
        $user->getOne('Profile');
    }
    $modx->event->_output = $user;
    $modx->event->stopPropagation();
    return;
}
$modx->log(modX::LOG_LEVEL_INFO,'[ActiveDirectory] Could not authenticate that user: "'.$username.'" with password "'.$scriptProperties['password'].'".');