mtools are behaving strange

[Peter Zechmeister]

I am running YDL 2.1 on a PowerMac 4400.
When I try to read Windows formatted floppydisks with mtools, the first
command succeeds but the second command does not work any more. I get the
message "Can't open /dev/fd0: Device or ressource busy
Cannot initialize 'A:'"

What kind of problem is that and how can I solve it?

And does anybody knew how to eject disks in a Mac floppy drive from Linux? I
do not want to use the small screwdriver allways.