Problems when passing Record object as script parameter

I can't seem to get the actual data in a record object.

From User Event script:

var newrecord = nlapiGetNewRecord();

var oldrecord = nlapiGetOldRecord();

var params = {};

params.custscript_newrecord = newrecord;

params.custscript_oldrecord = oldrecord;

nlapiScheduleScript('customscript_sc_scriptid', 'customdeploy_sc_deployid', params);

....

In Scheduled Script:

var newrecord= nlapiGetContext().getSetting('SCRIPT', 'custscript_newrecord');

var oldrecord = nlapiGetContext().getSetting('SCRIPT', 'custscript_oldrecord');

var newrecord_itemcount= newrecord.getLineItemCount('item'); -----> I get an error here that says "Cannot find function getLineItemCount in object nlobjRecord"

I have already tried doing JSON.stringify and JSON.parse but it's also not working.

Any help is greatly appreciated.

Thanks!