Status changes on adding expiration date

Hi all,

I’m currently struggeling with the following.
The Plugin works just fine. My client wanted me to create a widget that holds two kinds of post.
One of them is the jobman_job post type. Now this works fine.
It shows two kinds of posts based on placing date.

However if I add a expiration date on a job and that date passes the job goes in the archive but the status remains on ‘publish’. So it stays in my widget list.

Is there a way where I can change the status of the job where the expiration date has past.

Here is a snippet of the code I use in my widget.

$wpcust = new WP_Query(
array(
'post_type' => array('jobman_job','post'),
'showposts' => '5' ));

if ($wpcust->have_posts()): while( $wpcust->have_posts() ) : $wpcust->the_post(); ?>
<li>
<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
</li>

http://ww.wp.xz.cn/extend/plugins/job-manager/