I am helping my mom with her Fuze. She’s copied audiobooks from CD to the computer and we’ve successfully copied discs 1-3 and 5. However the rest of the discs show up on the Fuze when it’s connected with the computer, but when we unplug the device we can’t find discs 4, 6-10. Any suggestions as to how to make these show up? Again, when connected to the computer, they appear show up in the file and appear to be on the Fuze.