[Zope] Problem with Datetime under Zope 2.4

Hi all, I am fed up... :-( I am trying to execute python scripts by hand but I have a problem with the DateTime module. Here is it:

/Zope/bin/python MyFile.py

File "MyFile.py", line 3, in ? import DateTime File "/usr/local/Zope-2.4.0-linux2-x86/lib/python/DateTime/__init__.py", line 85, in ? from DateTime import DateTime File "/usr/local/Zope-2.4.0-linux2-x86/lib/python/DateTime/DateTime.py", line 90, in ? import re,sys, os, math, DateTimeZone Please help... Frederic Quin