I’m sorry to say that I gave up after spending houurs searching forums for a fix. i just had to remove rolescoper altogether since it was breaking the site.
which is a shame since it was really useful to be able to offer the presenters the chance to update their own pages.
I might have to rebuild the site and since WordPress and Rolescoper will have been updated several times since this occurred i hope it will work this time.
I wish there was a less enormous alternative to Rolescoper since I only wanted one commonly needed function – to restrict each user to editing their own page.