[Plugin: WordPress Related Posts] Broken

Plugin could not be activated because it triggered a fatal error.

Fatal error: Cannot redeclare wp_get_related_posts() (previously declared in /home/rcelis3/womptv.com/wp-content/themes/videozoom/functions/wpzoom-functions.php:762) in /home/rcelis3/womptv.com/wp-content/plugins/wordpress-23-related-posts-plugin/wp_related_posts.php on line 129