error in grub2 after delete partition

[mierdatutis mi]

I had in one disk:

Primary partition: xp
Extended partition: ubuntu and windows 7.

Now, I've changed the partitions. I delete the primary of xp and the
extended of windows 7. I've created a primary partition to install windows
7.

After I've installed windows 7, I boot with my ubuntu Live and I did an
update-grub.

Now I have grub2 installed and I can boot with my ubuntu but when I select
windows 7 it says me:
no such device: ec3883435345390
no such partition.

Could you help me please?
Many thanks and sorry for my english!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/ubuntu-users/attachments/20100530/90c68fe0/attachment.html>