[Zope] EmergencyUserCannotOwn error (access control ?)

I get this error when attempting to import a .zexp into the root folder from the management screen. OK so I created a user specifically to own the product, quit the browser and attempted to login as that user, but can't. I can't find a lucid (to me) explanation in the bundled docs. So any suggestions would be welcome as I'm confused and in need of guidance; it's more that I don't 'get' zope very deeply yet. using zope 2.5 on debian(woody) http://www.efn.org/~laprice ( Community, Cooperation, Consensus http://www.opn.org ( Openness to serendipity, make mistakes http://www.efn.org/~laprice/poems ( but learn from them.(carpe fructus ludi)