Rails - Jun 2007 - Problem in webservice

I have created a webservice named annonce (there is its code )
class AnnonceApi < ActionWebService::API::Base
  api_method :find_all_annonces,
  :returns => [[:int]]

and its controller has been declared in this way:

class BackendController < ApplicationController
  require ''annonce_api''

  wsdl_service_name ''Backend''
  web_service_api AnnonceApi
  web_service_scaffold :invoke

  def find_all_annonces
    Annonce.find(:all).map{ |annonce| annonce.id }
  end
end

when I try to test the invoke It work http://localhost:3009/backend/invoke
but when a client try to access to this webservice , he receives 2
kinds of errors

the first
----  uninitialized constant ClientController::AnnonceApi
when I use such method

 opts = {}
  client = ActionWebService::Client::Soap.new(AnnonceApi, ''http://
localhost:3009/backend/api'',:namespace=> "AnnonceApi",
:driver_options
=> opts)

  def list
    @annonces = client.find_all_annonces
  end
the second error
----- Missing API definition file in apis/annonce_api.rb

when using the other method
  web_client_api :annonce,:soap,"http://localhost:3009/backend/api"

   def list
   @annonces = client.find_all_annonces
  end


I need your help as soon as possible , because I am preparing a
project of my end studies , and I still have just a week to end its
so please if someone can answer me in this few days

thanks


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