PHP 5 sessions sub-domain problem

[Bengo]

Hi, Im developing a large auction website with 5 sub-domains, my major problem is that once I login from either of the 5 sub-domains I cannot access secure pages in the other sub-domains because the session variables do not work across the sub-domains. This means that I have to login in every sub-domain to be able to access secure functions and pages. Does anyone have a solution for this. I have used the following code

session_set_cookie_params(30 * 60, '/','.sokomart.co.ke');

This works perfectly in my local host.

[lampcms.com]

Add this to top of your script:
ini_set('session.cookie_domain', '.sokomart.co.ke');

Cookies will work for sub-domains then

[crmalibu]

Make sure you're setting the cookie domain before session_start() is called. Make sure you always set it before starting a session, on every script.

clear cookies and try again.