How to add system administrator resposibility from backend

BEGIN
fnd_user_pkg.addresp ('SKADIYALA','SYSADMIN','SYSTEM_ADMINISTRATOR','STANDARD','Add Responsibility to USER using pl/sql',SYSDATE,SYSDATE + 100);
COMMIT;
DBMS_OUTPUT.put_line ('Responsibility Added Successfully');
EXCEPTION
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line ( ' Responsibility is not added due to ' || SQLCODE || SUBSTR (SQLERRM, 1, 100));
ROLLBACK;
END;