Adding images using RSS feeds

i’m using this widget
http://www.district30.net/photo-sidebar-widget-version-20
its supposed to let you put images on your sidebar. Well I dled the file and put it on my server in the plugins folder. Activated the widget then added my rss feed. Maybe im not doing it right… This is what im trying to get to display
http://www.flickr.com/photos/25395285@N05/2394651779/
my site is mr2sellhomes.com