Warning: require(/Think/Think.class.php): failed to open stream: No such file or directory in D:\wamp\tieliu\ThinkPHP\ThinkPHP.php on line 189

Fatal error: require(): Failed opening required '/Think/Think.class.php' (include_path='.;C:\php\pear') in D:\wamp\tieliu\ThinkPHP\ThinkPHP.php on line 189