Repair Grub After Installed Win 7

I have a problem after installed Win 7. I can't reapir grub with orignially way. I think, something wrong in Win 7 boot loader. Win 7 boot loader is not same as Win Vista. However, I could find it in Ubuntu Forum.

$ sudo grub
grub > find /boot/grub/stage1

You will see hdX,Y. X and Y are number.

grub > root (hdX,Y)
grub > setup (hd0)
grub > quit

Cheer!!!!