Help With Create Admin Page

I read the book “Agile Web Application Development with Yii 1.1 and PHP5”, in the chapter 12, admin section i did as following the book and login to admin page but it asked “The requested URL /MyYii/trackstar/admin/default/index was not found on this server.” someone help me please. :(

in my opinion, the version of Yii is different from the version of Yii from ebook