Warning: require(./ThinkPHP/ThinkPHP.php) [function.require]: failed to open stream: No such file or directory in D:\wwwroot\mingyu\index.php on line 30

Fatal error: require() [function.require]: Failed opening required './ThinkPHP/ThinkPHP.php' (include_path='.;C:\php\pear') in D:\wwwroot\mingyu\index.php on line 30