IMPORTANT: This widget is tested on the default theme only, so it may require some hacks to suit your theme. If you need help please submit working markup and/or web location to see what the problem is, and I'll make my best to fix it.
REALLY IMPORTANT: Make sure that the plugin creates a folder
cache in your wp-content folder to cache RSS feeds, and that this folder is writeable (chmod 755 or chmod 777).
REALLY REALLY IMPORTANT: check your theme's header.php and footer.php for presence of wp_head(); (in the section) and wp_footer(); (near ), otherwise this plugin can't work. if you can't find them, INSERT THEM!