Grub won't go

Hi I have a dual boot system with two hard drives. W98 is on the first and SuSE 8.0 (at the moment) on the second. I was using 8,1 but for a few reasons decided to revert to 8.0. My problem is that having reinstalled both w98 and 8,0 I cannot boot either directly. What happens is that on boot the word GRUB appears and I cannot get any further. I can boot by using either the w98 or SuSE install discs ether of which will get me ti Lilo if i use the boot from hard disc option. Lilo is, or should be installed on the mbr of the first drive. I have tried fdisk/mbr from DOS but it made no difference. Can anybody suggest what else to try ? TIA Mike