SCDO - Change Document

Hye,
Facing problem with the change document with update status. The tables CDHDR & CDPOS are getting updated , however my custom table ZEMPTABL is not getting updated with new values.
The steps for creation i followed is as:
1) Custom table : ZEMPTABL with Change document ticked for data elements
2) SCDO - Object created.
3) My program which calls function module for write document:
REPORT ZMSR_TRACKCHNG_CUSTOMTBL.
TABLES : ZEMPTABL.
DATA : GS_EMPTABL LIKE ZEMPTABL,
       LS_EMPTABL LIKE ZEMPTABL.
DATA : T_CDTXT TYPE STANDARD TABLE OF CDTXT WITH HEADER LINE.
BREAK-POINT.
SELECT SINGLE * FROM ZEMPTABL INTO GS_EMPTABL
WHERE EMPNUM = '101'.
LS_EMPTABL = GS_EMPTABL.
GS_EMPTABL-EMPNUM = '101'.
GS_EMPTABL-EMPNAME = 'TET'.
T_CDTXT-TEILOBJID = 'ZTEST_TABL_CHNG'.
T_CDTXT-TEXTART = 'TEST'.
T_CDTXT-TEXTSPR = 'EN'.
T_CDTXT-UPDKZ = 'U'.
APPEND T_CDTXT.
CALL FUNCTION 'ZTEST_TABL_CHNG_WRITE_DOCUMENT'
EXPORTING
    OBJECTID                         = 'ZTEST_TABL_CHNG'
    TCODE                            = SY-TCODE
    UTIME                            = SY-UZEIT
    UDATE                            = SY-DATUM
    USERNAME                         = SY-UNAME
   PLANNED_CHANGE_NUMBER            = ' '
   OBJECT_CHANGE_INDICATOR          = 'U'
   PLANNED_OR_REAL_CHANGES          = 'U'
   NO_CHANGE_POINTERS               = 'U'
   UPD_ICDTXT_ZTEST_TABL_CHNG       = 'U'
    N_ZEMPTABL                       = GS_EMPTABL   "new values
    O_ZEMPTABL                       = LS_EMPTABL "old values
   UPD_ZEMPTABL                      = 'U'
   LV_OPT                           = ' '
TABLES
    ICDTXT_ZTEST_TABL_CHNG           = T_CDTXT
COMMIT WORK.
WAIT UP TO 3 SECONDS.
Can anyone let me know why the table is not getting updated with new values

You should have TWO function modules to call, like
* Update Database Table(s)
CALL FUNCTION 'ZTEST_TABL_CHNG_UPDATE' IN UPDATE TASK
     EXPORTING
          n_zemptabl                 = gs_emptabl "new values
          o_zemptabl                 = ls_emptabl "old values
          upd_zemptabl               = 'U'.
* Insert Change Document(s)
CALL FUNCTION 'ZTEST_TABL_CHNG_WRITE_DOCUMENT' IN UPDATE TASK
     EXPORTING
          objectid                   = 'ZTEST_TABL_CHNG'
          tcode                      = sy-tcode
          utime                      = sy-uzeit
          udate                      = sy-datum
          username                   = sy-uname
          planned_change_number      = ' '
          object_change_indicator    = 'U'
          planned_or_real_changes    = 'U'
          no_change_pointers         = 'U'
          upd_icdtxt_ztest_tabl_chng = 'U'
          n_zemptabl                 = gs_emptabl "new values
          o_zemptabl                 = ls_emptabl "old values
          upd_zemptabl               = 'U'
          lv_opt                     = ' '
     TABLES
          icdtxt_ztest_tabl_chng     = t_cdtxt.
COMMIT WORK.
Regards
Raymond

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http://help.sap.com/saphelp_nw70/helpdata/EN/12/83e03c19758e71e10000000a114084/content.htm
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