cache control and cookies...

I dont know too much about cache control, but some of the users who use my script, has problems with cookies. They are able to log in and the cookie is set and they click a link and get booted out. This past week, we noticed that when we commented out header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header ("Cache-Control: no-cache, must-revalidate"); header ("Pragma: no-cache"); they had no problems. Im looking for others who had similar experiences, and a fix if possible. Im not sure if its because the expires time is too far back. The cookie's lifetime is 1 month. Thanks -- Gerard Samuel http://www.trini0.org:81/ http://dev.trini0.org:81/