Uploading from Flickr? Impossible??

I created a new account and I am setting up all my settings stc..I created a flicker account to be able to post pictures in my blog. I got the Flickr add on and on the flickr page tried to set up. Am I right that we are using a Wordpress blog to post on BuddySlim? Ok, so I Try to add a blog to flickr and it asks for an API Endpoint and saying: Note: Wordpress users, your API Endpoint is http://your.blog.address/xmlrpc.php. However it always shows an error. Is anyone else using Flickr to upload photos and how the heck did you do it?! Thanks for your help