[Zope] Persistent Dictionary

[Garito]

Hi
When a user ask to my system for some data I "construct" a dictionary 
with all relevant data that I need (for example python scripts, Page 
Templates, etc)

I a part of the precess I need to make these dictionary persists between 
calls

I'm trying PersistentDict from 
http://www.zope.org/Members/AndrewWilcox/PersistentListDict and works 
fine (I can see the dictionary) but when I try to access to these 
dictionary keys I have these error:
Error Type: Unauthorized
Error Value: You are not allowed to access 'key in the dictionary I'm 
try to access' in this context

My question will be:

How can I create a persistent dictionary with some Zope objects references?

Thanks !
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