anonymous users can not see any content on page. Access denied

Hello Access denied You are not authorized to access this page. is the message, non registered users get when they visit my site.

The content has been enabled to be viewed by non registered users in the Settings > Users > Access Control > node module > access content enabled for anonymous users.

The site is www.gavanbright.com

thank you for any help you may be able to give me on this matter?

I am running Drupal 5.0
Operating system Linux
Service Status Click to View
Kernel version 2.6.9-42.0.8.ELsmp
Machine Type i686
Apache version 1.3.37 (Unix)
PERL version 5.8.7
PHP version 5.2.0
MySQL version 5.0.24-standard