My guess is that you are using the Flickr photo page URL for each shot:
http://www.flickr.com/photos/8419544...7630893949306/
Instead of the URL for an actual photo (which should always end in .jpg):
http://farm9.staticflickr.com/8166/7...58350dd7_b.jpg
Which, with the IMG tags, will then let you display the photo here on SSP:
One way to get the proper URL is to select "View all sizes" from the Actions drop down in Flickr, which will display the large size. Then right-click (windows) or ctrl-click (Mac) on the photo and select "Copy image address" from the menu that appears.
Hope this helps!