testing mx.DateTime fails on import (Py 2.1.1)

[wtr]

C:\Python21>testDT.py
Traceback (most recent call last):
  File "C:\Python21\testDT.py", line 3, in ?
    from mx.DateTime import *
<-------my import
  File "C:\Python21\mx\DateTime\__init__.py", line 40, in ?
    class modinit:
  File "C:\Python21\mx\DateTime\__init__.py", line 50, in modinit
    _DT)
  File "C:\Python22\lib\copy_reg.py", line 16, in pickle
    raise TypeError("copy_reg is not intended for use with classes")
TypeError: copy_reg is not intended for use with classes
-------------------------------------------------------------------

The directory structure is C:\Python21\mx\DateTime\mxDateTime,
which was generated at installation of the mx package.

Can anybody help?

Thanks,
wolfgang teschner