GRUB problem when Dual Booting Win XP and Fedora core 4

[iamroot]

My friend is having a problem with his FC4 and Win XP dual-boot. He can't start his OSes up. After reinstalling GRUB, he gets this

"GRUB loading Stage 1.5
GRUB loading, please wait...
internal error : the second sector of Stage 2 is unknown"

Anyone know what's going on?

[shams]

grub is not properly installed, try the fdisk/mbr. if he can get the xp bootloader back, if not, i think he should reinstall the xp, and how to boot to fedora read this link

[iamroot]

Okay. Thanks. I'll get back to him on this=)