problem in override mode in the report

This in this program when ever fields enter in the cats .this mode has to work. but its not working ...

Start of Change RD6K909098
* for Former Millercoors Salary Non-Exempt employee
* determine amount from Anaual salary

  IF r4 IS NOT INITIAL.
    DATA: lv_ansal         TYPE p0008-ansal.
* Get Annual Salary
    CALL FUNCTION 'RP_ANSAL_FROM_PERNR'
      EXPORTING
        f_date                       = pn-begda
        f_tclas                      = 'A'
        f_pernr                      = p0001-pernr
      IMPORTING
        f_ansal                      = lv_ansal
      EXCEPTIONS
        internal_error               = 1
        error_read_0001              = 2
        error_read_0008              = 3
        error_at_indirect_evaluation = 4
        currency_conversion_error    = 5
        OTHERS                       = 6.


*Start of Change kannan - RD6K911847
*Whenever override rate is applicable. choose CATSB rate as hourly rate instead of Annual salary / 2010 rate.
    IF  pi_wa_catsdb-bwgrl IS NOT INITIAL.
      lv_hrly_rate = pi_wa_catsdb-bwgrl.
    ELSE.
*End of Change Kannan - RD6K911847


*Hourly rate from Annaul salary
      lv_hrly_rate = lv_ansal / 2080.
*Start of Change kannan - RD6K911847
    ENDIF.
*End of Change Kannan - RD6K911847