sql - SQLPLUS dont create row -

i have unusual problem sqlplus connected oracledb 10g. have table sequence , trigger autoincrement id. created script inserting data table. when called form sqlplus goes ok (without error), rows not visible in object browser. when call same command sql command show in table without problems.

any ideas?

creating tables script:

-- create table drivers    create table drivers (        id number not null,        name varchar2(30) not null,        forname varchar2(30) not null,        plate_nr varchar2(7) not null,        engine number(2,1) default 1.4 null check(engine > 0), -- check allow values meets statement        passanger_space number default 3 null check(passanger_space > 0),        luggage_space number default 150 null check(luggage_space > 0),        primary key (id) -- id unique inside table , important    );     create sequence  drivers_seq; -- create sequence table     create or replace trigger drivers_trg -- create trigger    before insert on drivers -- if user want add row table    each row    begin      select drivers_seq.nextval :new.id dual; -- next value (autoincrement)    end;    / 

insert data script:

   insert drivers (name,forname,plate_nr,engine,passanger_space,luggage_space)                select 'paweł','jakubowski','abc1234',1.4,3,150     dual    union   select 'piotr','dobrzański','abc4321',1.8,2,null    dual    union   select 'kamil','nowak','77g0d77',2.2,15,500         dual    union   select 'agnieszka','kowalska','b3au7y6',1.4,3,175   dual    ;