problem with session and SSI

[Webrunner]

Hi,
I have created a page with the following start code:

Koodi [Valitse] Laajenna


ob_start();
$vp_page = 'index';
$ssi_layers = array('main');
require_once('forum/SSI.php');


Then i call from SSI the recent poll:

Koodi [Valitse] Laajenna


echo 'Poll:';
ssi_recentPoll();


When a user enters the website on this page and immediatly votes i get a session fault.
When another page (of the forum) is visited first i don't get this problem.
How can i create a session on this page (if needed)?

[Webrunner]

Also when someone presses the Log-out button they get a session ID fault.
I have been looking for the answer for quite some time now but i can't seem to find it