我写了一个不起作用的触发器。我错过了什么吗？

CREATE or REPLACE TRIGGER trigger_name
   AFTER INSERT OR UPDATE
   ON table1
   FOR EACH ROW
BEGIN
   INSERT INTO table2
        VALUES (NEW.request_id, NEW.user_concurrent_program_name,
                NEW.argument_text, NEW.comments, NEW.acknowledgement_status,
                SYSDATE, NEW.acknowledged_by);
END;
/
CREATE or REPLACE TRIGGER trigger_name
   AFTER