Red Hat 8.0 Installation Problem!

I've leeched all the five cd images and burned them to CD-Rs using Nero BurningROM under Windows XP. As the Red Hat installation program boots from the first CD-R, everything seems alright. But after choosing the language and the keyboard layout i get the message that "a Red Hat installation CD wasn't found". I have two CD-drives: a Hewlett-Packard DVD+RW burner and a Toshiba DVD-ROM. I've tried to install RH from both with no results. What am I doing wrong?