update sales order item texts using BAPI_SALESORDER_CHANGE

Dear Friends,

I am facing the problem in using bapi_salesorder_change to update the item texts.

I used the below logic.

ta_text-doc_number = ps_output-order1.

ta_text-itm_number = tp_item + 10.

ta_text-text_id = 'YATP'.

ta_text-langu = 'EN'.

ta_text-text_line = ps_output-atp_date.

APPEND ta_text.

CALL FUNCTION 'BAPI_SALESORDER_CHANGE'

EXPORTING

SALESDOCUMENT = tp_vbeln

ORDER_HEADER_IN = ts_order_header

ORDER_HEADER_INX = ts_order_headerx

TABLES

RETURN = ta_return

ORDER_ITEM_IN = ta_item

ORDER_ITEM_INX = ta_itemx

SCHEDULE_LINES = ta_sch_line

SCHEDULE_LINESX = ta_sch

ORDER_TEXT = ta_text.

Anybody have any idea, please suggest.

thanks

Jagadish