I seem to remember that having a HDD and a CD on the same controller can be problematic, even with a correct set up with the HDD as master and the CD Drive as slave.
Try connecting each of the drives to a seperate IDE channel. Go to the BIOS before rebooting and allow the drive to be found automatically. If you only have one IDE controller (not likely), try unplugging the CD drive ribbon and power cables, and boot with only the HDD present.
Two Dogs