Warning: require_once(./system/yk.php) [function.require-once]: failed to open stream: No such file or directory in D:\wwwroot\cwmte1\wwwroot\chengdu\index.php on line 17

Fatal error: require_once() [function.require]: Failed opening required './system/yk.php' (include_path='.;C:\php5\pear') in D:\wwwroot\cwmte1\wwwroot\chengdu\index.php on line 17