phpMyAgenda

I have installed phpMyAgenda in my Boy Scout website
and am hopeful that I can use it to schedule campouts.
The problem that I am running into is if I click on
one of the administration options it says:

Forbidden
You do not have permission to access this document.



And, if you look in the navigation window it is
pointing to: http://<my website>/admin/index.php3 but,
I have installed the software under http://<my
website>/phpMyAdmin/… At the root level, I am running
PHPNuke to support my other scout related website needs.