Write FORM doesn't work IN SAPSCRIPT

i'm Sure my internal table contain wealth of Data (multiline)

  DATA : begin of d_append occurs 100,

     STAWN type EIPO-STAWN,

     TEXT1 type T604T-TEXT1,

     SUM type EKPO-NETWR,

     SUM1 type EKPO-NETWR,

    end of d_append.

  CALL FUNCTION 'OPEN_FORM'

    EXPORTING

      FORM     = 'ZMEDRUCK2'

      language = sy-langu

    EXCEPTIONS

      others   = 1.

"  CALL FUNCTION 'WRITE_FORM'

                                                               "   EXPORTING

                                                                "    element = 'ITEM_HEADER_F'

                                                                 "   window  = 'MAIN'.

CALL FUNCTION 'CLOSE_FORM' .

and i must to pass this internal table in TEXT element in sapscript

in sapscript

/: PERFORM NGPGROUP IN PROGRAM Z_GROUP_NGP

/: USING &EKKO-EXNUM&

/: USING &EKKO-EBELN&

/: CHANGING &D_APPEND-STAWN&

/: CHANGING &D_APPEND-TEXT1&

/: CHANGING &D_APPEND-SUM&

/: CHANGING &D_APPEND-SUM1&

/: ENDPERFORM

but the result in me9f is empty

please somebody have an idea ??

KHABLACHI BESSEM