Ruby on Rails

hi i'm trying to upload photos to facebook using facebooker, in the
facebooker api  there's an example code, i try it  and i have this
error (in the view):

NO METHOD ERROR

undefined method 'photos_upload'

here is the code:

in the view:

<% form_tag photos_url(canvas =>false), :html => {:multipart =>
true, :promptpermission => 'photo_upload'} do %>
       Photo: <%= file_field_tag 'photo' %>
      Caption: <%= text_area_tag 'caption' %>
      <%= submit_tag 'Upload Photo', :class => 'inputsubmit' %>
 <% end %>

in the controller

def create
   file = Net::HTTP::MultipartPostFile.new(
      params[:photo].original_filename,
      params[:photo].content_type,
      params[:photo].read
   )

    @photo = facebook_session.user.upload_photo(file, :caption =>
params[:caption])
    redirect_to photos_url(:canvas => true)

end

please help me!!!.. I google it for a long time and i can't find a
solution :(

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