Not able to update EBAN table using BADI IF_EX_ME_PROCESS_REQ_CUST~POST

Hi experts,

I am trying to update the BEDNR field but it is not updating  can anybody please help me.

The below is my code.

   CALL METHOD im_header->get_data
    RECEIVING
      re_data = ls_header.


  IF ls_header-bsart EQ'RR'.
    IMPORT v_sale_no TO v_sale_no FROMMEMORYID'M1'.
    FREEMEMORYID'M1'.
  ENDIF.

   CALL METHOD im_header->get_items
    RECEIVING
      re_items = ls_item.

  LOOPAT ls_item INTO wa_item.
    lv_if_item = wa_item-item.

     CALLMETHOD lv_if_item->get_data
      RECEIVING
        re_data = lt_itm_data.

    CALLMETHOD lv_if_item->get_datax
    RECEIVING
      re_datax = lx_itm_data.

     lt_itm_data-bednr = v_sale_no. " here i am updating tracking number(BEDNR)
          lx_itm_data-bednr = 'X'.


       CALLMETHOD lv_if_item->set_datax
      EXPORTING
        im_datax = lx_itm_data.
          CALLMETHOD lv_if_item->set_data
      EXPORTING
        im_data = lt_itm_data.

     ENDLOOP.