workflow initiatin and user events triggers NOT EXECUTED if record created by script

Good morning,
I have a custom record type ('customrecord_to_trigger_on') on which I have defined a workflow (initiated on create/afterSubmit) and a user event script (executed on afterSubmit).

When I create the custom record from user interface everything works fine:
- the workflow is correctly initiated
- the afterSubmit code is executed

But I need to create the new custom record from a script execution (on afterSubmit of another custom record).
This doesn't triggers the events described above.

In the script where I create the new custom record, I wrote:

 var oNewRecord = nlapiCreateRecord('customrecord_to_trigger_on');  oNewRecord.setFieldValue('custrecord_field1', 'value1');  oNewRecord.setFieldValue('custrecord_field2', 'value2');  [...]  var nIdNewRecord = nlapiSubmitRecord(oNewRecord);