If you're using WSE 2.0 you can turn on the trace files in App.Config
(Client) and/or Web.Config (server).  Remember to create the directory
that the trace file is to be put in.  Also, don't forget to turn off
the trace when you're done (especially on the server side) as it will
be a performance drain.

-Paul

 <microsoft.web.services2>
   <!--
   <soapExtensionTypes>
     <add type="Microsoft.Web.Services2.WebServicesExtension,
Microsoft.Web.Services2, Version=2.0.3.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35" priority="1" group="0" />
   </soapExtensionTypes>
   -->
   <diagnostics>
     <trace enabled="true" input="c:\traces\ClientInput.xml
output="c:\traces\ClientOutput.xml" />
   </diagnostics>