title: WCF Service calling another WCF service fails with web error 400 Bad Request
body: <p>We have a web service that is called when user clicks save button on web form. The 'save' web service then makes a call into another web service (different machine).  The call always fails and as far as I can tell does not even attempt to cross the network because the Fiddler traffic is empty.  This problem only occurs when we call the second web service from the first web service.  If we call the second web service straight from the client or on page load, it works.  We are using WebHTTPBinding with REST type services.</p>
  
  <p>I used the WCF trace to come up with the error 'Envelope Version 'EnvelopeNone (<a href="http://schemas.microsoft.com/ws/2005/05/envelope/none" rel="nofollow noreferrer">http://schemas.microsoft.com/ws/2005/05/envelope/none</a>)' does not support adding Message Headers.', but I don't know how to resolve it.</p>
  
  <p>Any suggestions?</p>