so grub didnt properly install for you. what you would need to do is boot into rescue mode. for that, put in the cd and when the cd loads type "linux rescue" and hit enter. this takes you to the rescue mode. then type chroot /mnt/sysimage.
after that, check which hdd is the scsi using the "fdisk -l" command. then do a grub-install /dev/sda (/dev/sda --> should be scsi)