Problems upgrading sd1 OS

Hello,

I tried to upgrade my SD1 from 4.0b to 4.0c. After pressing F6 it diplays the message "Loading: DIRECTORY", the floppy led turns off and 4.0b loads normally.

Am I doing something wrong?

Thanks in advance,
Guillermo.

Be sure you unzipped the file directly to disk. (it will create a bootable disk)

Only copying will not work because this disk is not a bootable one.