Warning: require_once(class/n_config.php) [function.require-once]: failed to open stream: No such file or directory in D:\dj0551\blog\index.html on line 1

Fatal error: require_once() [function.require]: Failed opening required 'class/n_config.php' (include_path='.;C:\php5\pear') in D:\dj0551\blog\index.html on line 1