UserEvent Script-get values for button

HI There

I have a userevent script that is supposed to trigger a suitelet.

To do this, I have a button generated by the userevent that calls the suitelet.

This is userevent script correctly passes the id of the record that I am on (when the button is pressed).

However, I can't get the other field values to pass across as parameters.

Can you see where my script is wrong:

/**

 * @NApiVersion 2.x

 * @NScriptType UserEventScript

 */

define(["N/url"], function (url) {

  function beforeLoad(context) {

    try {

      if (

        context.type == context.UserEventType.CREATE ||

        context.type == context.UserEventType.EDIT

      ) {

        var recCurrent = context.newRecord;

      } else {

        var recCurrent = context.oldRecord;