Sessions and subdomains

[hannibal]

Hi,

 

I have https://domain.co.uk. If a user logs in and creates a session, when they are forwarded to http://www.domain.co.uk, the session is not accessible (i.e. cannot read what was set).

 

However, https://www.domain.co.uk which forwards to http://www.domain.co.uk allows the session to be read (same domain).

 

Any one know how I can read sessions from a subdomain?

 

Thanks,

 

H.