CI v1.5.4 Session question

To the best of my knowledge the PHP superglobal $_SESSION was not used until CI version 3.+. Prior to that, all session data was stored in the session cookie. That was the case for v2.x.x of CodeIgniter and I assume that was also the case for v1.x.x.

One thing you can try. Back in the early Session class the session data was held in a public property named "userdata". It was quite literally an associative array structured exactly the same way as PHP's  $_SESSION. So you should be able to

PHP Code:

var_dump($this->session->userdata); 


at the point where you expect all the pieces you need to be in place and see what the variables in play actually are.