open your current q.php or x.php script (found in your main folder)

find these lines:

if($signup){
$redirect="$domain/cgi-bin/affiliates.cgi?signup_form=1&adminid=$adminid";
header("Location: $redirect");
exit;
}

and change to:

if($signup){
$redirect="$domain/cgi-bin/affiliates.cgi?signup_form=1&id=$id&adminid=$adminid";
header("Location: $redirect");
exit;
}