Floppy Problem

Hi? For some reason my floppy drive won't load disks anymore, it keeps saying ?? like its trying to load an unknown or unsupported file. What can I do to fix this? thx in advance.

Try another floppy with a wav or snd file on it. The MPC recognizes MP3 files but can't play them back. It also recognizes txt files and other various types of data files but wil ONLY PLAYBACK snd or wav formated files. Oh yeah lmake sure those samples are 16 bit not 8bit, 12 bit 24 bit or etc;