phpMyAdmin显示空白页？

我用的是lighttpd+mysql+phpMyAdmin
可以访问http://localhost/
写了<?php phpinfo(); ?>也可以显示
于是把phpMyAdmin复制到/var/www/lighttpd路径下
但使用http://localhost/phpMyAdmin/和http://localhost/phpMyAdmin/index.php访问都是空白
在phpMyAdmin的index.php前面加上<?php phpinfo(); ?>后有显示，究竟是怎么回事阿？
我的phpMyAdmin的config.inc.php配置如下：
$cfg['PmaAbsoluteUri'] = 'http://localhost/phpMyAdmin/';
$cfg['blowfish_secret'] = '******';
$cfg['DefaultLang'] = 'zh';
$cfg['DefaultCharset'] = 'gb2312';
$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['port'] = '';
$cfg['Servers'][$i]['socket'] = '';
$cfg['Servers'][$i]['connect_type'] = 'tcp';
$cfg['Servers'][$i]['extension'] = 'mysql';
$cfg['Servers'][$i]['compress'] = FALSE;
$cfg['Servers'][$i]['controluser'] = 'root';
$cfg['Servers'][$i]['controlpass'] = '******';
$cfg['Servers'][$i]['auth_type'] = 'cookie';
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = '******';
在线等答案