InfoPath Dev

Hello,

I'm trying to create UDC file, that will connect to my webservice.

Webservice code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;

namespace TestWebService
{
    /// <summary>
    /// Summary description for Service1
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
    // [System.Web.Script.Services.ScriptService]
    public class Service1 : System.Web.Services.WebService
    {

        [WebMethod]
        public string HelloWorld()
        {
            return "Hello World";
        }
    }
}

 WebService is published on my IIS.

My UDC file:

<?xml version="1.0" encoding="UTF-8"?>
<?MicrosoftWindowsSharePointServices ContentTypeID="0x010100B4CBD48E029A4ad8B62CB0E41868F2B0"?>
<udc:DataSource MajorVersion="2" MinorVersion="0" xmlns:udc="http://schemas.microsoft.com/office/infopath/2006/udc">
  <udc:Name>GetRegionsUDC</udc:Name>
  <udc:Description>Testowy opisik</udc:Description>
  <udc:Type MajorVersion="2" MinorVersion="0" Type="WebService">
    <udc:SubType MajorVersion="0" MinorVersion="0" Type=""/>
  </udc:Type>
  <udc:ConnectionInfo Purpose="ReadOnly">
    <udc:WsdlUrl>http://server:21555/Test/Service1.asmx?wsdl</udc:WsdlUrl>
    <udc:SelectCommand>
      <udc:ServiceUrl UseFormsServiceProxy="true">http://server:21555/Test/Service1.asmx</udc:ServiceUrl>
      <udc:SoapAction />
    </udc:SelectCommand>
  </udc:ConnectionInfo>
</udc:DataSource>

 And when I try to add DataConnection in InfoPath I have error like
"The specified SoapAction value is invalid".

 Thanks for help.

GrYzLy