[Zope] Importing zexps doesn't work, same error for all. Help?

[Jeff Kowalczyk]

I have assembled several zexp archives in my import directory, and I'm
trying to import them as products on my Zope2.3.2 running on win2k.

Directory of C:\Program Files\WebSite\import
139,532 ZopeTutorialExamples.zexp
112,995 nolabox.zexp
 17,162 FormulatorExamples.zexp
 27,801 gdchartdemo.zexp
 40,520 IForum.zexp
  4,838 magictree.zexp
382,870 DemoLocalForum.zexp
 45,399 TimeTracker.zexp
235,283 WikiForum.zexp

With the exception of Iforum, they all do almost the same thing.

I go to products | import/export | 
- enter exact name of a given zexp
- try both ways of take/keep permissions, same result:

The object FormulatorExamples does not support this operation  
Traceback (innermost last):
  File C:\PROGRA~1\WEBSITE\lib\python\ZPublisher\Publish.py, line 223,
in publish_module
  File C:\PROGRA~1\WEBSITE\lib\python\ZPublisher\Publish.py, line 187,
in publish
  File C:\PROGRA~1\WEBSITE\lib\python\Zope\__init__.py, line 221, in
zpublisher_exception_hook
    (Object: Traversable)
  File C:\PROGRA~1\WEBSITE\lib\python\ZPublisher\Publish.py, line 171,
in publish
  File C:\PROGRA~1\WEBSITE\lib\python\ZPublisher\mapply.py, line 160, in
mapply
    (Object: manage_importObject)
  File C:\PROGRA~1\WEBSITE\lib\python\ZPublisher\Publish.py, line 112,
in call_object
    (Object: manage_importObject)
  File C:\PROGRA~1\WEBSITE\lib\python\OFS\ObjectManager.py, line 565, in
manage_importObject
    (Object: Traversable)
  File C:\PROGRA~1\WEBSITE\lib\python\OFS\CopySupport.py, line 444, in
_verifyObjectPaste
    (Object: Traversable)
Copy Error: (see above)

What am I doing wrong? Are these imports having a version problem, such
as being written for a version of Zope that had an earlier import API?

Thanks.