Cannot get this to work at all

Hi

I am running reviews on our site, http://www.greenwichmums.com, using standard WP posts, categorisation to sort the listings and an alternative review plugin. Its working well but I am looking for the ability to let members upload their own listings.

But I cannot get this plugin to work at all. I can install it absolutely fine, but as soon as I go through the configuration steps I experience Wordpress errors such as whitepage with the phrase 'Cheatin huh' and another listing that I don't have permission to view that page. Although I am logged in as an administrator ofcourse.

Can you help me please? I am running the latest version of Wordpress and Buddypress.

Thanks

James.