WickedPDF - wrong number of arguments

I'm trying to get this plugin to work for me. I'm having the
following issue when I try to render a pdf (/fancy_things/45.pdf )..

Any suggestions?

Thanks!

ERROR:

Started GET "/fancy_things/45.pdf" for 192.168.66.1 at Fri Dec 31
10:59:07 -0500 2010
  Processing by OrdersController#show as PDF
  Parameters: {"id"=>"45"}
***************WICKED***************
Completed in 4ms

ArgumentError (wrong number of arguments (1 for 0)):
  app/controllers/orders_controller.rb:20
  app/controllers/orders_controller.rb:9:in `show'

Rendered /usr/lib/ruby/gems/1.8/gems/actionpack-3.0.3/lib/
action_dispatch/middleware/templates/rescues/_trace.erb (4.8ms)
Rendered /usr/lib/ruby/gems/1.8/gems/actionpack-3.0.3/lib/
action_dispatch/middleware/templates/rescues/_request_and_response.erb
(30.6ms)
Rendered /usr/lib/ruby/gems/1.8/gems/actionpack-3.0.3/lib/
action_dispatch/middleware/templates/rescues/diagnostics.erb within
rescues/layout (49.7ms)

CONTROLLER:
  def show
    respond_to do |format|
      format.html { render 'show' }
      format.pdf do
        @example_text = "some text"
        render :pdf => "file_name",
               :template => 'offers/show.pdf.erb',
               :layout => 'pdf',
               :footer => {
                 :center => "Center",
                 :left => "Left",
                 :right => "Right"
               }
      end

    end

  end

I'm trying to get this plugin to work for me. I'm having the
following issue when I try to render a pdf (/fancy_things/45.pdf )..

Any suggestions?

Thanks!

ERROR:

Started GET "/fancy_things/45.pdf" for 192.168.66.1 at Fri Dec 31
10:59:07 -0500 2010
Processing by OrdersController#show as PDF
Parameters: {"id"=>"45"}
***************WICKED***************
Completed in 4ms

ArgumentError (wrong number of arguments (1 for 0)):
app/controllers/orders_controller.rb:20

It might be helpful if you told us which is line 20.

Colin