Trouble with 'Facebook Members' plugin

I am having difficulty getting the FB Box displayed on my WordPress.org site. I created my fanpage but when I go to enter the URL in the ‘Facebook Page Name’ box under settings, when I go to check it on the blog in the sidebar, its shows the following message “Could not retrieve id for the specified page. Please verify correct href was passed in.”

Do I need to add/adjust something in the editor? My blog address is http://www.facebook.com/pages/Where-The-Hell-is-Rory/218896168166662?sk=wall

I was told to add the URL only after http://www.facebook.com into the ‘Facebook Page Name’ box but its not yet working. I am still a WP Newb too so please be specific in any responses.

Thanks, Rory