dwlpl,
This is not at all an uncommom problem - it usually means the floppy disc is (s)crap
You can try the following, just in case, with fingers crossed ...
Try the floppy disc in another computer - some drives do seem better at coping with floppy discs than others - if it works then copy everything to the hard drive before you lose the data for good !
If the disc won't work in any computer then you can try running scan disk on it, probably as a last resort -
Right click the "A:" drive then select "Properties" / "Tools" and click "Check Now"
Whether you get it working or not have a think about alternatives to floppy discs as storage media - USB "pen" drives are cheap and fairly reliable, CD writers, even an extra hard disc, but if you keep using floppies you're bound run into this kind of problem eventually
Good Luck
