Semi-OT: HEEEEEEEELP!!!!!

[Strategia_In_Ultima]

I've got a disk with 3 files on it, at least 1 of which is very important - to me, at least. However, I cannot read the disk anymore! It worked perfectly until like several hours ago. I used it to store .doc files made in Word XP, but now I've installed Word 2003 on a Wndows 98 SE computer. It opened the files allright, and it saved them, but now the disk has become unreadable on both computers! I've tried it in the XP computer and in the 98 SE computer, both of them say the disk isn't formatted and both can't read the disk! Is there any way to get the data stored on that disk back? Please?