ZSK L 12 11

ckatra

Greetings to all.
This is my first post.

I have ZSK L 12 11 - 400 machine from 1995 or 1998 im not sure. The machine works on 720K floppy disks.
The machine CPU battery was dead and we replace it. After battery replacement, normally the machine "forgot" all the software, designs etc. With the machine come one floppy disk, supposedly with the software. So, I start the machine and says to choose to load modules, I insert the floppy and the machines gives DiskError:12.
Can someone tell me what to do? Someone have the software? Need some special formating of the floppy?

So many questions in my head. Im really confused.

Thanks for any help.