Web interface broken - Index of /Admin

Hi all, please forgive me as I am new to Freepbx, but I’m willing to learn. Walked in today and went to login to the web portal, the main screen came up as expected, but when I chose the Freepbx administration link, it took me to a web listing index of /admin. My boss (who was in working this weekend) swears he has not changed anything, and I have not done any upgrades or updates. Can someone point me in the right direction as to where to look to fix this? Asterisk with FreePBX 2.11 and Apache 2.2.3 on CentOS 5.5

Did some rooting around and decided to check the html logs, and bada bing, found this error:
[Thu Feb 28 08:14:50 2013] [error] [client] PHP Warning: session_start() [function.session-start]: open(/var/lib/php/session/sess_ig0ka7s1ps7m6ltmg9bhvap005, O_RDWR) failed: Permission denied (13) in /var/www/html/admin/config.php on line 69, referer:

I guess my session cookie expired? Oh well, I can get to it from Internet Exploder, will delete cookies and try again…sorry for the false help request…