title: Webservices invalid header guid exception
body: <p>I have a GUID &amp; token to be passed whenever a webmethod (webservice) is called, from client app that is consuming the webservice.</p>
  
  <ol>
  <li>Client app throws an <code>"Error:undefined"</code> javascript error &amp; it gives this as exception when viewed via firebug.</li>
  </ol>
  
  <blockquote>
  <pre><code>System.Web.Services.Protocols.SoapException:
  </code></pre>
    
    <p>Invalid GUID Header.</p>
    
    <p>System.Web.Services.Protocols.SoapMessage.RunExtensions(SoapExtension[]
    extensions, Boolean thrownException)
    at<br>
    System.Web.Services.Protocols.SoapServerProtocol.CreateServerInstance()
    at</p>
    
    <p>System.Web.Services.Protocols.WebServiceHandler.Invoke()
    at</p>
    
    <p>System.Web.Services.Protocols.WebServiceHandler.CoreProcesSRequest()</p>
  </blockquote>
  
  <p>Any idea?</p>
  
  <p>Thanks.</p>