Missing API definition !!

Hello, I have API for the selection of the advertisements in my BDD, I
it test http://localhost:3013/annonce/invoke Ca walks well but the
problem that at the time of the consomation of the Web local service
one with an application customer it my gives the probléme according

my API c :

class AnnonceApi < ActionWebService::API::Base
  api_method :find_all_annonces,
  :expects => [:int],
  :returns => [Annonce]

end

my Methode

class AnnonceController < ApplicationController
  wsdl_service_name 'Annonce'
  web_service_api AnnonceApi
  web_service_scaffold :invoke

  def find_all_annonces(id)
     Annonce.find(id)
  end
end

my Methode client in auther application in local

class ClientController < ApplicationController
  web_client_api :annonce,
  :soap,
    "http://localhost:3013/annonce/api"

  def list(id)
    annonce.find_all_annonces(id)
  end
end

Merci