Topic: Not showing tags, only all view

My tiltviewer is only showing images, when I don't use the options.tags setting inside the embedded.

In my flickr account, I see images on*ID*/tags/flower/

when I use options.tags = 'flower' inside my option selection, it does not load these images inside the viewer, as when I remove it, all my images are loaded inside.

Edit : If I delete my options.user_id , I can see the foto's of all flickr users with the tag flower.