index.php错误，求指点

在阿里云虚拟主机上想自己搭个wordpress，步骤都没为题，打开临时域名跳出如下提示，感觉是目录的表述问题？求大神指点Warning: require(__DIR__/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /data/home/bxu2442170501/htdocs/wordpress/index.php on line 17 Fatal error: require() [function.require]: Failed opening required '__DIR__/wp-blog-header.php' (include_path='.:/var/www/php5/lib/php') in /data/home/bxu2442170501/htdocs/wordpress/index.php on line 17