yaw_pakhtoon wrote:then how does phpBB work.. cause I am using this from school.. and everything works properly..
Right, and it will work perfectly on most setups.
I have used (public) computers in the past where sessions simply would not hold. In other words, there is some software running that causes a problem. For instance, if phpBB is able to set a cookie, but then the browser drops the cookie for some reason, you will be logged out.