[Zope] Problems copying Zclass instance

Hi everyone, I have found a really strange problem. I have a Zclass instance that cannot be copied and/or imported. Scanning through the code, this seems to be a permission related problem (i.e., the Zclass do not have the correct permission set). However, there is little help in the documentation. Someone can help ? Many thanks Paolo -- Paolo Bizzarri Icube S.r.l.