I am trying to do something which I though was very simple - change the Cost Estimate Type when an item is added to a sales order. I have the below but the change is not happening:

if ((type == 'item') && (name == 'item')) {
	 console.log('Changing Cost Estimate Type');
	 nlapiSetCurrentLineItemText('item','costestimatetype','Custom');
 }

Is it not possible to change the costestimate type via script?

code looks fine