After logging into your account on the Student Portal, you get an error message saying "Session Expired" and you must log back in again.
If you get this message when you are trying to register for the first time, you may not have browser "cookies" enabled.
(If you successfully logged in previously, then this is a security measure to automatically log you out if you leave the computer unattended for a period of time.)
Simutext.com must have browser cookies enabled to function properly. Make sure that your Web browser will accept cookies from simutext.com (you do not have to accept cookies from all sites).