change item condition in BADI order save with crm_order_maintain

Hi all,

i could update conditions in report but not successful in BADI order save, below is my code in BADI...

what is the problem maybe ? Ths

* Get order info.
  CALL FUNCTION 'CRM_ORDER_READ'
    EXPORTING
      it_header_guid       = lt_header_guid
      it_requested_objects = lt_requested_objects
    IMPORTING
      et_ORDERADM_I        = lt_ORDERADM_I
      ET_TEXT              = lt_text
      ET_STATUS            = lt_status
      et_pridoc            = et_pridoc
    EXCEPTIONS
      DOCUMENT_NOT_FOUND   = 1
      ERROR_OCCURRED       = 2
      DOCUMENT_LOCKED      = 3
      NO_CHANGE_AUTHORITY  = 4
      NO_DISPLAY_AUTHORITY = 5
      NO_CHANGE_ALLOWED    = 6
      OTHERS               = 7.

read table lt_ORDERADM_I into ls_ORDERADM_I with key ITM_TYPE = 'YTS1'.
  if sy-subrc = 0.
    read table et_pridoc INTO es_pridoc index 1.

    LOOP AT es_pridoc-pric_cond into es_pric_cond where kposn = ls_ORDERADM_I-guid.
      clear is_cond_chg.
      move-corresponding es_pric_cond to is_cond_chg.
      clear is_cond_chg-kbetr.   "  clear the amount
      INSERT is_cond_chg INTO TABLE is_pridoc-cond_change.
    endloop.

    CLEAR: lt_input_field_names.
    ls_input_field_names-fieldname = 'COND_CHANGE'.
    INSERT ls_input_field_names INTO TABLE lt_input_field_names.

    CLEAR: cs_input_fields, ct_input_fields.
    cs_input_fields-ref_guid = ls_ORDERADM_I-guid.
    cs_input_fields-ref_kind = 'B'.
    cs_input_fields-objectname = 'PRIDOC'.
    cs_input_fields-field_names = lt_input_field_names.
    INSERT cs_input_fields INTO table ct_input_fields.


    is_pridoc-ref_guid = ls_ORDERADM_I-guid.
    is_pridoc-ref_kind = 'B'.
    INSERT is_pridoc INTO it_pridoc INDEX 1.

  endif.

  CALL FUNCTION 'CRM_ORDER_MAINTAIN'
    EXPORTING
      it_pridoc         = it_pridoc
    CHANGING
      ct_input_fields   = ct_input_fields
    EXCEPTIONS
      error_occurred    = 1
      document_locked   = 2
      no_change_allowed = 3
      no_authority      = 4
      OTHERS            = 5.