You can fix this by manually adding "SCRIPTALIAS y" to the end of the /etc/wwwacct.conf file.
To do that, follow these steps:
1. Login to your server via ssh as root and open up the wwwacct.conf file: vi /etc/wwwacct.conf
2. Go to the bottom of the file and hit the 'i' key to make the file editable. Type in "SCRIPTALIAS y". The hit the 'esc' button to get out of the editable view.
3. Save the file and exit: :wq
4. Restart apache and you're ready to go: /etc/init.d/httpd restart