Call Web Service global element does not exist (APNX-1-4050-001)

 I am trying to use Call Web Service in my process model, but I am receiving the following error for the WSDL:

This Operation is unavailable. The following error occurred during the creation of the message schemas: The global element {clones.telcordia.com}xclimSchemaMain could not be imported because it does not exist in the XSD. No types have been imported. (APNX-1-4050-001)

xclimSchemaMain is defined as a global element in that namespace, so I don't know why it's giving me the error that it doesn't exist. It is referenced by this:

<message name="ClonesRequest">

<part name="requestObject" element="tns:xclimSchemaMain"/>

</message>

<message name="ClonesResponse">

<part name="responseObject" element="tns:xclimSchemaMain"/>

</message>

 I am unable to provide the WSDL since it given to us from a vendor that only provides it under contract.  The WSDL follows the current standards.  Has anyone else encountered this problem?