write to server help

Hallow

hallow i send this table to server but the problem that after the second perform

delete the data that write in first perform and so on ,how can i write to the same file all the table like append?

Regards

PERFORM write_2_server TABLES hire_emp_tab.

PERFORM write_2_server TABLES entrance_tab.

PERFORM write_2_server TABLES integration_tab.

PERFORM write_2_server TABLES duty_tab .

FIELD-SYMBOLS: <wa> TYPE ANY.

" MOVE 'D:_pa_test_mmsk_pa1.txt' TO adress.

OPEN DATASET adress IN TEXT MODE

ENCODING DEFAULT FOR OUTPUT.

IF sy-subrc = 0.

no_file = ' '.

LOOP AT p_tab_data ASSIGNING <wa>.

TRANSFER <wa> TO adress.

ENDLOOP.

CLOSE DATASET adress.

ELSE.

no_file = 'X'.

ENDIF.