[Zope] folder name problem

Hi, using Zope 2.6.0 with Python 2.1.3 on Solaris 7, I come across the following strangeness: I have a folder called 'hq'. Inside this I want to add another folder called 'manage'. there is nothing inside hq called anything like manage. When I try to add the folder, I am told that this is a bad request, because the id 'manage' is already in use. It clearly isn't in use in this folder. Is this some kind of reserved word in Zope? thanks Ben Avery YouthNet UK