Logout after a while... AJAX

suw

I've built a massmail module which order the server to send mails and get sent mails status trough AJAX. Using this on 23000 adresses take a while, time which I suppose is considered by FuelCMS as inactive.
From time to time - if I get 3 errors from AJAX - I reload the whole page using javascript (document.location=__FUEL_PATH__+"/massmail/campain").

Now, the problem is that I can't finish a campain, without 2 or 3 logouts.
As session I am using mysql.
How can I tell fuelCMS to NOT log me out - while one campain is active.
Trough Ajax? is there any method?

suw

ok - I think I got it

from config.php I had

$config['sess_expiration']	= 7200;

I set it to 0 - now my login session won't expire (hope so!)