带LDAP的Dokuwiki错误:用户身份验证暂时不可用

authtype: authldap

Plugin Authldap(捆绑插件)设置

plugin»authldap»server: localhost
plugin»authldap»port: 10389
plugin»authldap»usertree: ou=People,o=sevenSeas
plugin»authldap»grouptree: ou=Groups,o=sevenSeas
plugin»authldap»userfilter:
plugin»authldap»groupfilter:
plugin»authldap»version: 3
plugin»authldap»binddn: uid=admin,ou=system
plugin»authldap»bindpw: secret

Local.php内容

<?php
/*
 * Dokuwiki's Main Configuration File - Local Settings
 * Auto-generated by config plugin
 * Run for user: 
 * Date: Fri, 20 Jun 2014 10:04:50 +0200
 */
$conf['title'] = 'Sample Wiki';
$conf['license'] = 'cc-by-sa';
$conf['useacl'] = 1;
$conf['authtype'] = 'authldap';
$conf['superuser'] = '@admin,jhallett';
$conf['disableactions'] = 'register,resendpwd,profile';
$conf['proxy']['user'] = 'admin';
$conf['proxy']['pass'] = '<b>OU9sLi8nXVw=';
$conf['plugin']['authldap']['server'] = 'localhost';
$conf['plugin']['authldap']['port'] = 10389;
$conf['plugin']['authldap']['usertree'] = 'ou=People,o=sevenSeas';
$conf['plugin']['authldap']['grouptree'] = 'ou=Groups,o=sevenSeas';
$conf['plugin']['authldap']['version'] = 3;
$conf['plugin']['authldap']['binddn'] = 'uid=admin,ou=system';
$conf['plugin']['authldap']['bindpw'] = 'secret';
$conf['openregister'] = '0';
// end auto-generated content

LDAP使用Apache DS 2.0.0和Apache Directory Studio 2.0.0运行在Java 1.7.0_51.

都已成功安装。我遵循入门指南中的默认安装，并添加了示例配置和示例LDIF。

我使用的是入门指南中的默认配置:

Default Port: 10389
Default Bind DN: uid=admin,ou=system
Default Bind Password: secret

保存dokuwiki配置时，出现以下错误:

User authentication is temporarily unavailable. 
If this situation persists, please inform your Wiki Admin.

我该怎么做来解决这个问题?