title: Dynamics CRM 2011 - WCF error
body: <p>I am trying to get to grips with MS Dynamics CRM 2011. I have have the beta installed on a VM and things look pretty good - some great new features etc.</p>
  
  <p>However I am getting an exception when trying to connect to the new XRMServices (updated 2011 WCF web services)</p>
  
  <pre><code> Exception: System.ServiceModel.ServiceActivationException: The service    
   '/organame/XRMServices/2011/Organization.svc' cannot be activated due to an
   exception during compilation.  The exception message is:
   'System.ServiceModel.Description.UseRequestHeadersForMetadataAddressBehavior'. 
   This collection only supports one instance of each type.
   Parameter name: item. ---&gt; System.ArgumentException: The value could not be added to
   the collection, as the collection already contains an item of the same type: 
   'System.ServiceModel.Description.UseRequestHeadersForMetadataAddressBehavior'. 
   This collection only supports one instance of each type.
   Parameter name: item
  </code></pre>
  
  <p>The only reference to this exception I gave found suggests that it is caused by multiple bindings configured in IIS, which in my case I did have, but the problem persists even after removing them.</p>
  
  <p>Any suggestions would be appreciated.</p>