cookie problem

Hi all, Perhaps some one can help me. If I send a cookie like setcookie("cookie_agtpasswd",$form_agent_pass, time()+1200, "/"); it does not work on the terminal which has a new version of windows 2000 and i use IE6. The browser does not store the cookie. but if is use setcookie("cookie_agtpasswd",$form_agent_pass); I can retrive the cookie variable. This happens on a few terminal but for other with win 2000 it both cookie send works fine. Has anyone come across this problem? Has anyone got any suggestions. Is this a problem of the win 2000 or the browser setting. thanks, Hasan