WCF Custom username validator is not working

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C#

WCF

web_development

Hi Team,
I am developing a sample WCF service with security, as i am new to WCF i just to establish a connection through username and password(Note: no need of SSL certificate).

I am using the following code,

In service the code is

The interface contains the code,

namespace WcfService
{
   [ServiceContract]
    public interface IWcfService
    {
        [OperationContract]
        string GetData();
    }
}

the inherited class has

namespace WcfService
{
    public class WcfService : IWcfService
    {
        public string GetData()
        {
            return "Sample Service";
        }
    }

    public class CustomValidator : UserNamePasswordValidator
    {
        public override void Validate(string userName, string password)
        {
            if (userName == "manikandan" && password == "manikandan")
            {

            }
            else
            {

            }
        }
    }

}

The web.config in the service is

<system.serviceModel>
        <services>
            <service behaviorConfiguration="WcfService.WcfServiceBehavior" name="WcfService.WcfService">
                <endpoint address="" binding="basicHttpBinding" bindingConfiguration="MyBinding" contract="WcfService.IWcfService">
                    <identity>
                        <dns value="localhost"/>
                    </identity>
                </endpoint>
                <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
            </service>
        </services>
        <behaviors>
            <serviceBehaviors>
                <behavior name="WcfService.WcfServiceBehavior">
                    <serviceMetadata httpGetEnabled="true"/>
                    <serviceDebug includeExceptionDetailInFaults="false"/>
                </behavior>
            </serviceBehaviors>
        </behaviors>
    <bindings>
      <basicHttpBinding>
        <binding name="MyBinding">
          <security mode="None">
            <message clientCredentialType="UserName"/>
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    </system.serviceModel>

And i am consuming the service in the web application as follows,
I am just adding the service reference and invoke the service using the following code,

ServiceReference1.WcfServiceClient client = new WcfServiceClient();
        client.ClientCredentials.UserName.UserName = "manikandan";
        client.ClientCredentials.UserName.Password = "manikandan";
        string state= client.State.ToString();
        string val= client.GetData();
        txtEmpId.Text = val;

where ServiceReference1 is the name for my service

Could you guys see the code and tell me what mistake i made, i placed debugger on every method, the CustomValidator is not firing, so it is not authenticated. How can i secure it, with just username and password without certificate.
Thanks in advance.