Warning: require_once(../lib/connection.php) [function.require-once]: failed to open stream: No such file or directory in C:\inetpub\wwwroot\Calendar\index.php on line 4

Fatal error: require_once() [function.require]: Failed opening required '../lib/connection.php' (include_path='.;C:\php5\pear') in C:\inetpub\wwwroot\Calendar\index.php on line 4