how to set user authority on WIN2000 Server

Hello, I previously use php4.0RC1 under win2000+iis5.0, the system authority of the php scripts directory I set is like this: Administrator & Services & System: full control IUSER-SERVERNAME: read & run My scripts carry out a session function, and I didn't use the session functions of PHP4 (becuase it is not working properly under win2000), but realized it by hand. It is like this: Login in static page --> process login php script the script does this: check login valid if (valid){ setcookie("SESSIONID",$sessionvalue) header("Location: someother.php3\n\n"); } if (error-occurs) include("displayerror.php3"); It goes well until I switch the php to 4.0pl1, errors is like this: sometimes it report that connot open 'displayerror.php3' file. and sometime it seems has jump to 'someother.php3', but cookie is not set. now I found that I must set the authrity of the C:\ to Everyone with full control, but I think it is very dangerous. Any suggestions is welcome, thanx. Regards, Tiefeng, Jia 11:45:59 2000-07-05 ===================================================== CACN http://www.cacn.com Tel: 86-28-6253667X228 =====================================================