New dual-boot install: Cannot boot Ubuntu

[Tom H]

> I just installed Kubuntu 9.10 on a machine that dual-boots Windows XP.
> The machine has two IDE drives, this is the partition layout:
>
> sda1: 160 GB: shared FAT32 partition. In Windows: F:, in Ubuntu: /media/shared
> sdb1: 30 GB: Windows XP C:
> sdb2: 2 GB: swap
> sdb3: 48 GB: Kubuntu 9.10
>
> Even though C: is on sdb, the BIOS was configured to boot from sda
> (confirmed to to device names and sizes). Therefore, I installed Grub
> on sda. However, when I restart the machine after install, Grub did
> not come up and the machine booted into Windows. Therefore, I
> configured the BIOS to boot from sdb in the hopes that maybe I made a
> mistake and installed Grub there. However, the machine _still_ booted
> into Windows!
>
> I therefore reinstalled and this time installed Grub to sdb. However,
> no matter if the BIOS is configured to boot from sda or sdb, it always
> boots Windows from sdb1!
>
> What must I do to diagnose and repair this? Thanks!

Could you post the output of boot info script?
http://sourceforge.net/projects/bootinfoscript/