BizTalk 2010 Error consuming WCF service metadata. Object reference not set to an instance of an object.

Question

"Error consuming WCF service metadata.
Object reference not set to an instance of an object."
I have no clue what happen to my BizTalk.  I checked all the below forum but m clueless why BTS not consuming WCF through Generated Items. I tried both metadata exhange endpoint and metadata file through
svcutil. but all my wcf services are working fine with .net C# client.
http://blogs.msdn.com/b/appfabriccat/archive/2010/11/23/how-using-duplex-mep-to-communicate-with-biztalk-from-a-net-application-or-a-wf-workflow-running-inside-appfabric-part-1.aspx
http://msdn.microsoft.com/en-us/library/bb226552.aspx
http://msdn.microsoft.com/en-us/library/bb798122.aspx
http://masteringbiztalkserver.wordpress.com/tag/wcf-service-consuming-wizard/
I reinstall the WCF lob Adapter SDK to my BizTalk VM but still no clue. no erros in event viewer nothing.
http://www.abdulazizfarooqi.wordpress.com Abdul Aziz Farooqi [BizTalk & SharePoint Consultant] MCPD Web & MCPD SharePoint 2010

Answer 1

Thanks from me too Neal - this worked from me. I wan't able to consume directly from exchange because the certificate is broken. However, I was able to convince Google Chrome to let me view the /Services.wsdl and from there I could save the .wsdl and two
.xsd files. In my case the problem lay at the top of the .wsdl file. I changed the following:
<wsdl:types>
        <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
            <xs:import namespace="http://schemas.microsoft.com/exchange/services/2006/messages" schemaLocation="messages.xsd"/>
        </xs:schema>
by giving the same targetNamespace as assigned in the <wsdl:definitions element, so I ended up with
<wsdl:types>
        <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://schemas.microsoft.com/exchange/services/2006/messages">
            <xs:import namespace="http://schemas.microsoft.com/exchange/services/2006/messages" schemaLocation="messages.xsd"/>
        </xs:schema>