Older versions of ubuntu donot automatically add the chain loader for GRUB...
Two methods from here,
METHOD I
Pop in your windows CD and "repair" installation... windows bootloader will be installed over GRUB fixing the problem ... however you will not be able to take advantage of the more advanced bootloader [grub]
Method II
In linux...
Navigate to /boot/grub/menu.lst [path depends on you Distirio, in general search for menu.lst]
Uncomment:
Code:
# For booting Windows NT or Windows95
title Windows NT / Windows 95 boot menu
root (hd0,0)
makeactive
chainloader +1
# For loading DOS if Windows NT is installed
# chainload /bootsect.dos
Save.
You may need admin privilages for this. [login as root]