ALV to excel

Hi,

I am facing problem in dowloading alv to excel for one particular field.

Code for the column is:

month - yy.

for ex: July -13  But after dowloading it shows 13 - July.

CALL FUNCTION 'ISP_GET_MONTH_NAME'

      EXPORTING

       DATE               = wa_final-lwd

        language           = SY-LANGU

*       MONTH_NUMBER       = '00'

     IMPORTING

*       LANGU_BACK         =

*       LONGTEXT           =

       SHORTTEXT          = month

*     EXCEPTIONS

*       CALENDAR_ID        = 1

*       DATE_ERROR         = 2

*       NOT_FOUND          = 3

*       WRONG_INPUT        = 4

*       OTHERS             = 5

              .

    IF sy-subrc <> 0.

* Implement suitable error handling here

    ENDIF.

CONCATENATE month '-'  wa_final-lwd+2(2) INTO wa_final-month_yy.

Please help.

Thanks in advance.