[Zope] Problems with anonymous access to MetaPublisher 1.2.8

Hi, I'm running Zope 2.5.1 on Linux, and I'm having trouble with the MetaPublisher 1.2.8 product. When I try to access meta publisher objects anonymously through the web, I get the following error message: Error Type: Unauthorised Error Value: You are not allowed to access entryIds in this context. I was following the product's tutorial when the error first occurred. What is the point in a publishing product that prevents the site visitors from seeing the published content? If this is a bug, then it's probably a fundamental flaw. So, what am I doing wrong? Thanks in advance, Elliot