public void Main()
        {
            // TODO: Add your code here

                        // TODO: Add your code here
            MessageBox.Show((string)Dts.Variables["ServiceDateStart"].Value);

            string userName = "xxx";
            string password = "xxx";
            string licenceID = "xxx";
            ServiceReference.AuthenticationHeader a = new ServiceReference.AuthenticationHeader();
            a.LicenceID = new Guid(licenceID);
            a.UserName = userName;
            a.Password = password;
            ServiceReference.CompanyAccountXmlServiceSoapClient service = new ServiceReference.CompanyAccountXmlServiceSoapClient();

            string result;
            long numberOfResults;
            int counter1 = 0;
            int counter2 = 19;



            do
            {



               result = service.GetCompanyAccountUpdated(a, (string)Dts.Variables["ServiceDateStart"].Value, (string)Dts.Variables["ServiceDateEnd"].Value, counter1, counter2);
               //result = service.GetCompanyAccountUpdated(a, "20150101", "20150107", counter1, counter2);
                counter1 = counter1 + 20;
                counter2 = counter2 + 20;



                using (System.IO.StreamWriter file =
      new System.IO.StreamWriter(@"C:UsersjkrnetaDocumentsGetCompanyAccountUpdated.txt", true))
             {


                 file.WriteLine(result);


             }

            } while (!result.Equals("<CompanyAccountDataSet />"));


            Dts.TaskResult = (int)ScriptResults.Success;
        }

ServiceReference.CompanyAccountXmlServiceSoapClient service = new ServiceReference.CompanyAccountXmlServiceSoapClient();

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <system.serviceModel>
        <bindings>
            <basicHttpBinding>
                <binding name="CompanyAccountXmlServiceSoap">
                    <security mode="Transport" />
                </binding>
                <binding name="CompanyAccountXmlServiceSoap1" />
            </basicHttpBinding>
        </bindings>
        <client>
            <endpoint address="https://webservices.nbs.rs/CommunicationOfficeService1_0/CompanyAccountXmlService.asmx"
                binding="basicHttpBinding" bindingConfiguration="CompanyAccountXmlServiceSoap"
                contract="ServiceReference.CompanyAccountXmlServiceSoap" name="CompanyAccountXmlServiceSoap" />
        </client>
    </system.serviceModel>
</configuration>