[Zope] KeyError with everything

[Jamie van Dyke]

Hi,  I wondered if anyone could help me on this issue that is driving 
me nuts.  I'm new to zope, and google has been fruitless on this.

I have installed Zope 2.7, Plone 2.0.5, and have Python 2.4 on.  Not 
supported, I know, but I needed 2.4 for something else, so figured I'd 
try it.

Anyway, I have it all up and running fine, but some Products won't 
install.  E.g.  SimpleBlog, CMFBoard, and ArchExample.  Well, okay, 
they will install, and zope will start, but they all have the same 
symptoms.  Whenever I add a blog, forum, or article from them, I get a 
KeyError, on field 'zid'.  With ArchExample, it actually says "I can't 
find this file", but I know it means the same error (I hope).

I've also tried creating my own class in ArgoUML, ArchGenXML'ing it, 
and I get the same with that too.  Even if I create the simplest of 
classes.

Wha could be wrong here?  Give me hints and I'll dig deeper, it's just 
that I can't find anything on google at all  :-/

Thanks,
Jamie