Trying to loop thru a sales order and change the location of each line item. Setup a custom list field referencing locations to allow user to pick where it should be reassigned. Reassigns the ORDER Location just fine, but not updating item locations. Thoughts?

function updateLocation() {
  var location_new = nlapiGetFieldValue('custbody_so_change_location_to');
  var location_old = nlapiGetFieldValue('location');
  var count     = nlapiGetLineItemCount('item');
  var ret    = "";

  //UPDATE LINE ITEM LOCATION
  for (i = 1; i <= count; i++) {
    nlapiSelectLineItem('item', i);
    nlapiSetCurrentLineItemValue('item', 'location', location_new, true, true);
  }

  ret = ret + "Updated " + count + " line item(s) to location " + location_new + "\n";

  nlapiSetFieldValue('location',location_new);

  return ret;

}