[Zope] Suggestions regarding two errors w/ZClass?

[Kent Polk]

(Zope version: Zope 2.1.4 (binary release, python 1.5.2, solaris-2.6-sparc) )

I have a ZClass with base classes: ZObject, _ZClass_for_CatalogAware,
_ZClass_for_Folder & ZObjectManager which allows me to create a 
tree of my ZClass instances. I would like to be able to cut and
paste my ZClass instances, but when I attempt to paste : 

<!--
 Error type:  AttributeError
 Error value: aq_acquire
 -->