Login session issues with HTTP headers

[RedLinux]

Hi,

I need help on modification of HTTP headers as I am facing issue with login sessions with my php based website.

I have two different instances with similar LAMP setup on both.

http://www.example.com

http://www.local.example.com

Please check Expires headers in file attached, for

http://www.local.example.com

it shows a very old date "Thu, 19 Nov 1981 08:52:00 GMT" where as on

http://www.example.com

it's showing current date which causes cache not to expire login cookies and does not allow to logout from

http://www.example.com,

there is no such issue on

http://www.local.example.com,

configuration on both instances is same.

Regards,
AK

http://files.engineering.com/getfil...0-f3e946593aac&file=apache_expire_headers.txt