[split] ajax killing sessions?

Thanks for your answer!  I have made the changes you suggested.  My only question now is, do I just load it in the auto like this:

$autoload['libraries'] = array('database','session');
I have done that and see no errors, I am just double checking? 
My app is not a one pager, its several pages, but there can be multiple requests sent at the same time as much as we have tried to ensure a queue some ajax requests are still causing the session to die.