Plugin: Popularity Contest

I found in my error log file the following message:

[01-Apr-2009 05:51:08] PHP Fatal error: require() [function.require]: Failed opening required ‘../wp-blog-header.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/jrocasco/public_html/wp-content/plugins/popularity-contest.php on line 59

I checked out plugin file for Popularity Plugin version 1.3b3 line 59 (highlighted as bold):

58 if (!isset($wpdb)) {
59	require('../wp-blog-header.php');
60	akpc_init();
}

Is this a serious issue? Would this cause excessive server load? How can this be fixed?

Much thanks everyone!