Feedwordpress .99 problem

I am using Feedwordpress .99 with WordPress 2.3.1. I want to use Pimproll RSS feeds to create posts; but something is tampering with the RSS url, causing me to get the error displayed at http://www.sexxx-den.com/thumbnail_galleries/blog/.

This is a sample url: http://rss.pimproll.com/rss.php?w=4&p=ft&r=pimp6348&c=1&j=13&init=1&tpl=1&tpl=8&tpl_cycle=seq

Is there any help that you can offer?