12.04 - How to fix the boot set up?

I got two OSes in my PC, Ubuntu and Windows 7.

Until yesterday Windows 7 was on top of my dual-boot menu list, but I wanted to change it, so I went inside Windows configurations and put Ubuntu first, but I also set the time to 0 because I thought I could access Windows through Grub.

But what happens is that after I upgraded Ubuntu to 11.10, that screen with boot options don't show Windows 7 anymore.

I went online searching for a solution to my problem, most of them told me to configure some Grub options and others to use programs to do it. I've done them all and still can't access Windows 7.

Just in case my problem is not clear yet, this is how was my boot order before I messed it all up:

Windows 7
Ubuntu

with a time of 10 secs to choose between both.

This is how I wanted it to be:

Ubuntu
Windows 7

with 0 time to choose, but, inside Ubuntu I could access Windows through that Grub screen.

But this is what happens:

Ubuntu
Windows 7

0 time, so it don't let me choose anything and jumps inside Ubuntu then inside Ubuntu grub doesn't show up anymore (black screen) and it starts Ubuntu normally.

I tried to fix this many times from different ways inside Ubuntu but nothing worked, also when I try do something and then upgrade my grub with sudo upgrade-grub it shows this message:

Generating grub.cfg ...

Found Windows 7 (loader) on /dev/sda1
Skipping Windows 7 (loader) on Wubi system
Found linux image: /boot/vmlinuz-3.0.0-12-generic
Found initrd image: /boot/initrd.img-3.0.0-12-generic
Found linux image: /boot/vmlinuz-2.6.38-12-generic
Found initrd image: /boot/initrd.img-2.6.38-12-generic
done

Thats why in the title I said it could probably be my WUBI messing all up.

Anyone heave a solution for this? Do you need more information?

I have a netbook so I cannot use the Windows Repair CD.