Can't finish tutorial.

I tried to pass a Codeigniter tutorial at http://www.codeigniter.com/user_guide/tu...ction.html
seems I did all step by step from the guide, but I met 2 problems. When I filled some stuff to data base, and created 2 news manually, and tried to click "View article"     , it sends me to index.php/1st and shows me 404 error     .

By tinkering around I found that article actually exist,     but it has different adress /index.php/news/1st. But I don't know why it's broken and how to fix it.
Is tutorial guide old and out-of-date, or I failed?

Also same problem with the http://www.codeigniter.com/user_guide/tu...items.html
when I finished it,     I can't add news through web-form. It sends me to 404 page     with ridiculous adress.

Ty for attention.