i have this in my home.pl

$id = $session->id();
$session->param('logged_in', $username);
$session->expire('+10m');
print "Location: welcome.pl?sid=$id\n\n";
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i have this in my welcome.pl

$sid = $cgi->param('sid');
$session = CGI::Session->load($sid);

if($session->is_expired) {
    print $cgi->redirect("home.pl");
    print $cgi->header();
}
elsif($session->is_empty) {
    print $cgi->redirect("home.pl");
    print $cgi->header();
}
[download]

both home.pl and welcome.pl works very well but when i try to place same welcome.pl session code to other page inside welcome.pl, it just redirects me to login, it doesn't read session sid like welcome.pl. eg like if i place welcome.pl session code to myaccount.pl when i click to myaccount.pl, it just redirects me to login and the session is still valid not expired