So logged in as admin I can send and recieve pm's no problem, but logged in as just a registered user always errors when I click on the message subject or when I try to select a user to send a message to. I don't know where to start looking on how to fix this?

How do the URLs look like when the error appears?

Do you have a third party SEF installed?
Do you use Joomla SEF and if have you changed your htaccess file?

Which Joomla do you use?

I had made a link to the PMS only available to "special" users because I was testing and did not want all the "registered" users to use the PMS yet. I did not htink that this link would affect access to the PMS through the fireboard profiles.

Registered users could still access the PMS from fireboard and see a list of messages, but that's it.

As soon as I changed the link I created on my user menu from special to registered it then fixed ny issue with the registered send and receive ability.

Now my only problem is I can't use the notifier module. It functions perfectly, but if I follow it to read and then compose a message I get the 401 error someone else posted about. I am not using any CB plug in on this site.