Nokia 5510 Bad Sector??

I have some problems with my 5510.
I've got 7-8 files undeletable (?) files. When i try to delete them,
no error, or something, they just simply stays, with 0 kb size.
I've tried to look into the files with a notepad, but xp says that
i should scandisk the drive because it might has some bad sector.
Scandisk says it can't scan the drive because it doesn't support 16 bit fat. (Or something like that :)
Well it's not a big problem, but what if the entire drive (phone)
got bad?

Did you get any chance how to solve your problem. I have 2 apps which got stuck like your situation. Please lett me know if you come up with someting, thanks!