Looks like they have a few security issues so be warned if you are running this script on your site(s) http://www.blizsoft.com/article - this is the demo link from their website I've emailed them and raised a ticket, maybe you should too.
Got a response from the makers of Article Manager Pro... "This is not the script being hack but someone uploaded an article with the HTML content of the "fake hacking message" which we have removed" Guess you need to either approve articles/comments before going live to avoid this. Maybe there is a setting in the admin for that.