[Zope] ZWikiWebs Product

Has anyone else had trouble using the ZWikiWeb product? As Manager, there are no problems, but users I have added cannot add ZWikiWebs in their own folders. While already logged in, a login box comes up, meaning they do not have the necessary permissions. When I cancel the box, I get the Zope error message stating that the user is not authorized to access Control_Panel. I have given the user role (that I created) access to view contents, view, use factories, change zwiki pages, and serveral others. Is there something I am missing? Thanks, Matt