When I try to access floppy discs I get this messege:
A:\Not accessible
No ID address mark found on the floppy disc.

Also when I try to format barnd new floppies the drive spins a little and stops.
Any suggustions as to what might be the problem and possible solutions.
Thanks

Apparently, this is a very common problem.
Check this web page for one possible solution.

http://www.eio.com/public/floppdrv/0546.html

That solution is part of a long, long group of posts. There are numerous people complaining of this problem and several other possible solutions are offered, which worked for some of the posters.
The one above involves installing a new driver for the floppy disk controller and gives step by step instructions.