Warning: require_once(./common.php) [function.require-once]: failed to open stream: No such file or directory in E:\webhost\5imac.com\www\index.php on line 12

Fatal error: require_once() [function.require]: Failed opening required './common.php' (include_path='.;C:\php5\pear') in E:\webhost\5imac.com\www\index.php on line 12