Zope crash on startup (Mandrake Linux 7.2)

I've got a problem starting up Zope for the first time on my Mandrake Linux 7.2 system. Basically I've installed the Zope and Zope-zserver packages.

I haven't been able to even start up the zserver and am getting nowhere fast. I suspect it's pilot error, but I'd appreciate a pointer to the right location or documentation (I'm not a dummy!).

The Zope package is current as of today:

Zope-zserver-2.2.4-1.3mdk
Zope-2.2.4-1.3mdk

Thanks,
.../Ed

Here's the content of /var/log/zope:

Traceback (innermost last):
File "z2.py", line 554, in ?
exec "import "+MODULE in {}
File "<string>", line 1, in ?
File "/usr/share/zope/lib/python/Zope/__init__.py", line 95, in ?
import Globals, OFS.Application, sys
File "/usr/share/zope/lib/python/OFS/Application.py", line 91, in ?
import Globals,Folder,os,sys,App.Product, App.ProductRegistry, misc_
File "/usr/share/zope/lib/python/App/Product.py", line 118, in ?
from HelpSys.HelpSys import ProductHelp
File "/usr/share/zope/lib/python/HelpSys/__init__.py", line 87, in ?
import HelpSys
File "/usr/share/zope/lib/python/HelpSys/HelpSys.py", line 93, in ?
import HelpTopic
File "/usr/share/zope/lib/python/HelpSys/HelpTopic.py", line 95, in ?
class HelpTopicBase:
File "/usr/share/zope/lib/python/HelpSys/HelpTopic.py", line 116, in HelpTopic
Base
permissions_values=ComputedAttribute(_permissions_values, 1)
TypeError: too many arguments; expected 2, got 3