#77 install problem??

[Pedro]

http://chrono.guiltyspike.net/pj/index.php

Fatal error: Unknown(): The script tried to execute a
method or access a property of an incomplete object.
Please ensure that the class definition
<b>adodb_mysql</b> of the object you are trying to
operate on was loaded _before_ the session was started
in /home/guiltyspike/www/chrono/pj/include/class.Chat.in
c on line 1131

i cant seem to Fix this problem

what do i need to do?