No persmission to view a flickr set

I found this link in another discussion:
http://www.thursdayschild.ca/flickr/1/sets/72157608254836083

As you can see, the set is displayed in the drupal environment. But when I try to do the same on http://localhost/drupal-6.4/flickr/1/sets/72157609370512473 I get the message "Excess denied. You don't have enough excess rights for this page".

(Hopefully this is the correct message, because I translated this myself, since I use a translated Drupal)

I already tried the fix suggested in http://drupal.org/node/321182, but since I'm kindof a newbie I don't know if I did things the right way. As far as my persmissions concern in "admin/user/permissions" all flickr module persmission is on the level of "authenticated user", so that shouldn't be the problem. And in "admin/build/modules" I activated all Flickr modules.

Anyone who knows the answer?
Thanx in advance!