Dynamic Permissions Problems

Newbie here.
I have created a project using dynamic permissions for security, which uses a database table for the users login names and passwords.
Two problems:

1. The admin user works just fine. When I add another user and assign them to a group other than admin, after the new user logs in, rather than the list page being displayed, they get a listing of the contents of the directory.
   
2. When the admin assigns users to groups, then clicks the 'save' button, the browser displays "The webpage cannot be found" 404, etc. Checking the Apache log, this is the error:
   "script 'C:/Program Files (x86)/Apache Software Foundation/Apache2.2/av/output/adminmembers.php' not found or unable to stat, referer: http://127.0.0.1/av/output/admin_members_list.php";
   The group settings are actually saved, but it seems the redirect to load the page is missing whatever comes between "adminmembers" and ".php". Since these files are generated, I'm not sure why this happened.
   Running:
   
   Apache 2.2 on a PC
   
   PHP 5.3.3
   
   PHPrunner 5.2 build 5482
   Thanks for any help.