Invoke .Net WebService error in RoR

I have written a webservice:

----------- Service.cs ----------------
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = “”)]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
public string HelloWorld(string name) {
return "Hello, " + name;

--------------- END of Servcie.cs --------------------

In test_api.rb:
api_method :HelloWorld, :expects => [{:name => :string}], :returns =>

In test_controller:
web_client_api :test, :soap, “http://localhost/test/Service.asmx”,
:namespace => “”,
:soap_action_base => “”,
:driver_options=>{:default_encodingstyle =>
SOAP::EncodingStyle::ASPDotNetHandler::Namespace }

def hello
render_text test.HelloWorld(“Li Jie”)

It works, but parameters is wrong, the name is null.

I have added some code in rubylib/soap/rpc/proxy.rb:

def route(req_header, req_body, reqopt, resopt)
conn_data.send_string.gsub!(/:n1/, ‘’) #ADD
conn_data.send_string.gsub!(/n1:/, ‘’) #ADD

conn_data = @streamhandler.send(@endpoint_url, conn_data,

It removes the namespace ‘n1’, and it works find. But I think this is
wrong way, can anyone fix it?