GRUB doesnt recognize Win7

Hi all,
Installed 11.3, but GRUB doesnt recognize win7 despite the fact that it did say it recognizes it during installation. What now? :-\ thanks

Post me some info:

Open a terminal and do as su -

fdisk -l
cat /boot/grub/menu.lst

Post both results
And just in case: Become su in Terminal - HowTo