Rails - Oct 2009 - NEWBIE using flickr_fu, impossible to retrieve a user's tags list

Retrieving images using tags : OK!
def index
  flickr = Flickr.new(File.join(RAILS_ROOT, ''config'',
''flickr.yml''))
  @photos = flickr.photos.search(:user_id => "12323423432@N05",
:tags
=> params[:tag], ..
end
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How can I retrieve my list of TAGS from flickr? What am I missing ?