RSS dynamic slide generator doesn't work

This could happen, when the allow_url_fopen isn't enabled on your server, which would allow the rss content to be asked down by your site. You can check it, if you would create a php file with this code in it:

<?php
if( ini_get('allow_url_fopen')){
   echo 'it is turned on';
} else {
   echo 'it isn\'t turned on';
}
?>

upload it to your ftp, and check it through your browser. If it will write out, that it's not turned on, then you should contact your server host, and ask them to turn it on.