Warning: require_once(./inc/header.inc.php) [function.require-once]: failed to open stream: No such file or directory in C:\wamp\www\join.php on line 24

Fatal error: require_once() [function.require]: Failed opening required './inc/header.inc.php' (include_path='.;C:\php5\pear') in C:\wamp\www\join.php on line 24