I have a webservice which is built on WSE 2.0.

On the client side I am using .net2.0 and WSE 3.0. I added webreference to
the above webservice.
And also I added a custom filter to add some custom header elements.

Here is my question
Why the custom filter ProcessMessage method is not getting executed when I
invoke a webmethod/
I would really appreciate you help.

Here is some of my code from the web.config

<configSections>
        <section name="microsoft.web.services3"
type="Microsoft.Web.Services3.Configuration.WebServicesConfiguration,
Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35" />
</configSections>

<microsoft.web.services3>
        <policy filename="wse3policyCache.config"></policy>
        <diagnostics>
            <trace enabled="true" input="InputTrace.webinfo"
output="OutputTrace.webinfo" />
        </diagnostics>
    </microsoft.web.services3>

I created a configuration policy file called "wse3policyCache.config"

policies xmlns="http://schemas.microsoft.com/wse/2005/06/policy">
 <extensions>
     <extension name="requireActionHeader"
type="Microsoft.Web.Services3.Design.RequireActionHeaderAssertion,
Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35" />     
    <extension name="customFilter"
type="CustomPolicy.CustomPolicyAssertion, CustomPolicy"/>
 </extensions>
 <policy name="ClientPolicy">
    <requireActionHeader />
     <customFilter />
 </policy>
</policies>

I created a policy assertion class(CustomPolicyAssertion) and soapfilter
class(ClientOutputFilter )

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography.X509Certificates;
using System.Xml;
using Microsoft.Web.Services3;
using Microsoft.Web.Services3.Design;
using Microsoft.Web.Services3.Security;
using Microsoft.Web.Services3.Security.Tokens;

namespace CustomPolicy
{

    public class CustomPolicyAssertion:  PolicyAssertion
    {
        public override SoapFilter CreateClientOutputFilter(FilterCreationContext
context)
        {
            return new ClientOutputFilter ();
        }

        public override SoapFilter CreateClientInputFilter(FilterCreationContext
context)
        {
            return null;
        }

        public override SoapFilter CreateServiceOutputFilter(FilterCreationContext
context)
        {
            return null;
        }

        public override SoapFilter CreateServiceInputFilter(FilterCreationContext
context)
        {
            return null;
        }
    }
}

using Microsoft.Win32;
using System;
using System.Xml;
using Microsoft.Web.Services3;
using System.Diagnostics;

namespace CustomPolicy
{
    public class ClientOutputFilter : SoapFilter
    {
        public ClientOutputFilter()
        {
        }

        public override SoapFilterResult ProcessMessage(SoapEnvelope envelope)

        {
            EventLog.WriteEntry("OutputFilter", "Processmessage");

            //write code here to modify

            return SoapFilterResult.Continue;
        }
    }
}