Grub Errors

[Eric]

I just installed Ubuntu because I seemed to have done something that 
stopped me from being able to boot Kubuntu. My computer used to dual 
boot that and Mandriva. Now I can get Mandriva to boot but I can't get 
Kubuntu to boot.

I have two hard drives and Mandriva is installed on one and Kubuntu on 
the other.

I get this error message when I try to boot into Kubuntu.

root (hd1,0)
Filesystem type is ext2fs, partition type 0 x 83
Configfile /boot/grub/menu.lst
Error 18 selected cylinder exceeds maximum supported by Bios


Anyone know how to straighten this out? I am not opposed to reinstalling 
either or both operating systems if that's the easiest solution. I just 
backed up all my files on both operating systems.

Thanks for your help.

Eric Jackson