Keep saying screenname not found

Downloaded this plugin today and fiddled with it for quite a while. No luck: keep saying my screenname not found in flickr. I did the findByUsername thing and it returned my userid and username with no problem. I also checked that I don’t have strict privacy setting.

I have no problem displaying flickr photos in my page using another plugin, but that plugin can’t display sets.

Very disappointed this plugin doesn’t work for me.

http://ww.wp.xz.cn/plugins/flickr-set-slideshows/