Cookies still store old value(Help!!)

Dear Expert, I have to store user detail and password in the cookies so that i can detect if particular user is allowed to enter certain website Example is like this: User "A" is allowed to enter student page User "B" is allowed to enter lecturer page Both have to enter password with login at login page When User "A" enter ,the cookies will store User "A" name,when he enters the lecturer page,he will be directed to login page again(because he is not allowed to enter lecturer page) and so do User "B". BUT THE PROBLEM HAPPENS LIKE THIS: When User "A" enters ,and then User "B" enters,User "B" CAN ENTER THE STUDENT PAGE AND THE COOKIES STORE USER USER "A" VALUE.BUT WHEN I REFRESH IT ,THE COOKIES WILL STORE NOTHING AND REDIRECT TO LOGIN PAGE. Can i know what the problem is? Thank you very much,it is really annoying me because someone can enter other page if other has used that before Sincerely Yours Hendry Sumilo hsumilo@hotmail.com http://members.tripodasia.com.my/hsumilo _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.