Indonesia Payroll : NAMTD shows zero value

Hi Gurus,

we are implementing payroll indonesia with monthly period 16 - 15 ( not 1 - 30/31)

when the schema call NAMTD, why some employee shows zero value while others not,

ex :

period : 01.2013 (16.12.2012 - 15.01.2013)

employee A :

  hire 16.12.2012

employee B :

  hire 01.01.2013

both employee's date type 01 already set to with the same hire date

why NAMTD values always shows zero for employee A only, while employee B just fine

did i miss some configuration steps?

please helpp..

thanks in advance