Rails - Jan 2006 - webservice problem (cant make client)

hey, i have made a webservice 
http://twodecode.pilot.localhost.be:3000/backend/wsdl
here i can see the wsdl file

i have a method string Authenticate(string twa, string login, string pass)
when i do /invoke i can test it, this all works

backend_api.rb
class BackendApi < ActionWebService::API::Base 
  api_method 	:authenticate,
  	:expects => [{:twa =>:string},{:login =>:string},{:pass
=>:string}],
  	:returns => [{:responsecode =>:string}]
end

backend_controller.rb
class BackendController < ApplicationController
  wsdl_service_name ''Backend''
	web_service_api BackendApi
	web_service_scaffold :invoke
	
	# Constants
	TWA_INVALID 				= "TWA_INVALID"
	USER_NOT_FOUND				= "USER_NOT_FOUND"
	USER_FOUND				= "USER_FOUND"

	def authenticate(twa, login, pass)
		user = User.authenticate(login,  pass)
		if user == nil then
			return USER_NOT_FOUND
  		else
  			return USER_FOUND
  		end
	end
end



Authenticate(''xxx'',''test'',''test'')
=> returns "USER_NOT_FOUND"
Authenticate(''xxx'',''test'',''testpass'')
=> returns "USER_FOUND"

No i want to write a client as a standalone program but he always get parse
error xml, i have tried mutiple options, here are they, with an error
description above it

Anyone can help me get the right method....


require ''action_web_service''
require ''soap/rpc/driver''
require ''uri''
require ''soap/wsdlDriver''
require "xmlrpc/client"

# Initialize the SOAP driver
wsdl = "http://twodecode.pilot.localhost.be:3000/backend/wsdl"
wsdl2 = "http://twodecode.pilot.localhost.be:3000/backend/api/RPC2"
ns = "urn:ActionWebService"
			
#xml parser error
#~ proxy = SOAP::RPC::Driver.new(wsdl, ''urn:ActionWebService'')
#~ proxy.add_method(''Authenticate'', ''twa'',
''login'', ''pass'')
#~ result = proxy.Authenticate(''xxx'',
''test'',''test'')
		
#xml parser error
#~ @drv = SOAP::RPC::Driver.new(wsdl, ''urn:ActionWebService'')
#~ @drv.add_rpc_method_with_soapaction(''Authenticate'',
''urn:ActionWebService#Authenticate'', ''twa'',
''login'', ''pass'')
#~ result = @drv.Authenticate(''xxx'',
''test'',''test'')
		
#xml parser error
#~ drv = SOAP::RPC::Driver.new(wsdl,''urn:ActionWebService'') 
#~ drv.add_method_with_soapaction("Authenticate",
''urn:ActionWebService'' +
"/#Authenticate", ''twa'', ''login'',
''pass'')
#~ @result =
drv.Authenticate(''xxx'',''test'',''test'')
			
#post not supported,xml parser error
#~ wiredump_dev=STDERR
#~ service = SOAP::RPC::Driver.new(wsdl, ns)
#~ service.wiredump_dev=wiredump_dev
#~ service.add_method_with_soapaction("Authenticate", ns +
"/Authenticate",
''twa'', ''login'', ''pass'')
#~ @result =
service.Authenticate(''xxx'',''test'',''test'')
		
#undefined method Authenticate
#wsdl = "http://localhost/Twodecode.Webservices/Webservices.asmx?WSDL"
#~ factory = SOAP::WSDLDriverFactory.new(wsdl)
#~ @driver = factory.createDriver
#~ result =
@driver.Authenticate(''xxx'',''test'',''test'')

#undefined mehtod create_rpc_driver
#~ drv = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
#~ drv.wiredump_dev = STDOUT 
#~ dwml =
drv.Authenticate(''xxx'',''test'',''test'')
		
#uninitialized constant ActionWebService
#~ soap_client =
ActionWebService::Client::Soap.new(''BackendApi'', wsdl2)
#~ result =
soap_client.Authenticate(''xxx'',''test'',''test'')

Thanks in advance
Nick