HD Install :: Grub not running after hard disk change

Hello,
I have DSL and Win2000 on my laptop, with a 2.0 Gb hard disk and 4 partitons (ntfs, fat32, ext3, swap) and grub as bootloader.
I have made an image of the entire disk with norton ghost and I have changed the old hd with a new bigger one (5.0 Gb).
When I have replaced the image onto the disk, I have choosen to enlarge every partiton.
But now grub doesn't work.
Any idea?

Thanks in advance.

reinstall grub, i dont know how but that is the way you fix it, maybe.

Solved !!!
Symantec Support KnowledgeBase
I booted with the DSL livecd without X, then I mounted all the partitions and I followed the instructions below.

original here.