Ubuntu 11.04 question?

Well, I ate a pie, this happens alot, but is not exactly a "Problem". What I would do is take the files off of your third partition and put them on either your user folder on Windows or your home folder on Ubuntu. After doing that, delete the third partition. Why do you have a third one? Any ways... Do that and if your Windows partition is also being unmounted from Ubuntu, try uninstalling it (Be very careful how you do it, though.) and putting it back on using Wubi. This will put your Windows folder in a folder named "host" and your third will probably be in "media".