Session variable not storing in custom trigger

Question

I have a custom trigger in which I want to store a session variable , so i can use the value in the insert transaction which happens after. But for some reason the session variable is not stored, resulting in the data not being stored.
any clues would help.
rudi
here are the relevant code:
//start Trigger_Custom_Subject_Mentor trigger
function Trigger_Custom_Subject_Mentor(&$tNG) {
//Check subject exists
@session_start();
$_SESSION['sb_id'] = $subject_id;
//end Trigger_Custom_Subject_Mentor trigger
// Make an insert transaction instance
$ins_share = new tNG_insert($conn_smart);
$tNGs->addTransaction($ins_share);
// Register triggers
$ins_share->registerTrigger("STARTER", "Trigger_Default_Starter", 1, "POST", "KT_Insert1");
$ins_share->registerTrigger("END", "Trigger_Redirect", 90);
// Add columns
$ins_share->setTable("`share`");
$ins_share->addColumn("share_item", "NUMERIC_TYPE", "POST", "share_item");
$ins_share->addColumn("share_subject", "NUMERIC_TYPE", "SESSION", "sb_id");
$ins_share->setPrimaryKey("share_id", "NUMERIC_TYPE");
// Register triggers
$ins_share->registerTrigger("STARTER", "Trigger_Default_Starter", 1, "POST", "KT_Insert1");
$ins_share->registerTrigger("BEFORE", "Trigger_Custom_Subject_Mentor", 50);
$ins_share->registerTrigger("END", "Trigger_Default_Redirect", 99, "share.php?item_id={share_item}");

Answer 1

hi User,
1) Pull a dummy column in Fx use the Session variable --->(Variable -->session )
2) Next, goto narrative view in Narrative view section use @1
3) If u want you can hide the column that we created in criteria section