[Zope] Installing ZPatterns: The Beat Goes On...

[Ben Ocean]

Hi;
I rebuilt Zope and I'm reinstalling ZPatterns. Hopefully I can get it to 
work this time. I've run into this error:

2001-11-14T10:23:12 ERROR(200) Zope Could not import Products.ZPatterns
Traceback (innermost last):
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/OFS/Application.py, 
line 563, in import_product
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/Products/ZPatterns/__init__.py, 
line 1, in ?
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/Products/ZPatterns/Rack.py, 
line 1, in ?
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/Products/ZPatterns/DataManagers.py, 
line 6, in ?
     (Object: ComputedAttribute)
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/Products/ZPatterns/AttributeProviders.py, 
line 7, in ?
   File 
/apache/ZopeInstallation/Zope_software_home/lib/python/Products/ZPatterns/Expressions.py, 
line 38, in ?
     (Object: ComputedAttribute)
ImportError: cannot import name expr_globals

How shall I edit the file?
TIA,
BenO