Error Installing 1.6

I have done everything according to the tutorial for installing 1.6 from source.

I am running debian lenny and had to force the server to run 5.3 (lenny doesnt like 5.3 by default)

I got to the login page, put in admin, admin and it would bring me back to the login page. I redid the database tables and now I get:

Fatal error: Uncaught exception 'Zend_Session_Exception' with message 'Zend_Session::start() - /var/www/imvu/sc/airtime/library/Zend/Session.php(Line:480): Error #2 session_start(): Function spl_autoload_call() hasn't defined the class it was called for Array' in /var/www/imvu/sc/airtime/library/Zend/Session.php:493 Stack trace: #0 /var/www/imvu/sc/airtime/application/Bootstrap.php(33): Zend_Session::start() #1 /var/www/imvu/sc/airtime/library/Zend/Application.php(320): require_once('/var/www/imvu/s...') #2 /var/www/imvu/sc/airtime/library/Zend/Application.php(184): Zend_Application->setBootstrap('/var/www/imvu/s...', 'Bootstrap') #3 /var/www/imvu/sc/airtime/library/Zend/Application.php(92): Zend_Application->setOptions(Array) #4 /var/www/imvu/sc/airtime/public/index.php(33): Zend_Application->__construct('development', '/var/www/imvu/s...') #5 {main} thrown in /var/www/imvu/sc/airtime/library/Zend/Session.php on line 493

Something seems to be wrong with my sessions. Any help is appreciated.