CompuServe Messages

Does anyone know how to get the Microsoft Developer Network CD to work with CDNet Workbench? If I "CMOUNT" the CD prior to running windows and run the MSDN software directly in Windows everything works fine. But if I attempt to access it via CDNet Workbench, I get a bunch of bizarre error messages such as "E0-0157() Message E0-0517 Missing" followed by: "The search engine could not be opened and cannot be used." I have successfully setup several other applications (both DOS and Windows) in CDNET Workbench, but this one has me stumped. The CD I am attempting to use is "Microsoft Developer Network CD, January 1993, Pre-release 2". The volume name is "MSDNP2". I am using a Pioneer DRM-604X CD-ROM changer with an Adaptec controller.