Session trouble

[nat]

Hi
I had got my sessions to work like i wanted them to, but when i shutdown my computer and tryed it again the session varibales wern't being passed anymore. Does anyone know why this happened? It dosn't work anymore and was wondering why and who this could happed.

session_start();

if($login == 'admin')
{

do_html_header("Admin User");
$valid_user = $login;
$SESSION['valid_user'] = $login;
echo $SESSION['valid_user'];
}
else if($login == 'normal')
{
do_html_header("Normal User");
$valid_user = $login;
$SESSION['valid_user'] = $login;
echo $SESSION['valid_user'];
}
else if($login == 'teacher')
{
do_html_header("Teacher User");
$_SESSION['valid_user'] = $login;
$valid_user = $login;
}

---

session_start();
if($valid_user == 'normal')
{
// if a normal user
$buttons[0] = 'log-out';
do_html_header("Book Equipment");
echo " Normal";
display_toolbar($buttons);
}

[rrijnders]

I don't understand your problem. You shut down the client or the server? And what do you mean when you say the session variables "wern't being passed anymore"? Do you mean that the server script could not retrieve NEW session values, or the OLD session values you set before your shut down your computer?