Why cann't I boot from CD?

[windinrain]

You have to change your BIOS setting so that bootingfrom Cdrom is possible.

I have done that, so I think the problem is in the procedure of burnding the CD. The iso_image could be unzipped with the software ' winrar' , after unzipping, there will be several files and folders.

In the CD I have burnned, the files and folders are as follow:
Demos KNOPPIX Talks autorun.bat autorun.inf cdrom.ico index.html

When I put the CD in windows, the file index.html will auto run,.
In folder KNOPPIX there has the file boot.img and many other files

I have redownloaded a new ISO-image, and I will burned the CD second time, may this time I'll be successful.

Think all of you!