Newbie Cookie problem--no longer newbie???

Hi Thanks for your mails. I just now found out that the problem is with IE5. I generally use IE5 and hence was all along thinking that it wasnt working fine. Now that means i am in a new area now. The problem is still the same.I need a reliable way of ensuring that two different users do not logon from the same browser (different instances ofcourse!) from the same machine. What am i doing now my cookie name is cookie_user if(!isset(cookie_user)) { /* allow user to login */ setcookie("cookie_user","$username","","/"); } else { echo("User u are already logged in another browser window-hence no login"); } This is working fine with netscape. But in IE 5 it allows two logins. In each page i have the value of $cookie_user displayed and when i open two instances of the window two different names are carried through and displayed..Most of the discussion in the lists seem to be about the cookie not being set. I have not been able to locate this problem anywhere... wud u know of any solution Thanks a lot for your help Arun TickleWit.com Pvt Ltd 0 98300 24824 91 33 3574692