Warning: include(./ThinkPHP/ThinkPHP.php): failed to open stream: No such file or directory in index.php on line 23

Warning: include(): Failed opening './ThinkPHP/ThinkPHP.php' for inclusion (include_path='.;C:\php\pear') in index.php on line 23
<?php
/**
* 系统单一入口文件
*/
//if(version_compare(PHP_VERSION,'5.3.0','<')) die('require PHP > 5.3.0 !');
ini_set("max_execution_time", "1800");
/**
* 系统调试设置
* 项目正式部署后请设置为false
*/

define ( 'APP_DEBUG', TRUE );
/**
* 应用目录设置
* 安全期间，建议安装调试完成后移动到非WEB目录
*/
define('APP_NAME','App');
define('APP_PATH','./App/');
/**
* 缓存目录设置
* 此目录必须可写，建议移动到非WEB目录
*/
include './ThinkPHP/ThinkPHP.php'; /////////是这行
?>
应该是路劲搞错了，求指教