Hi Antonio,

I replaced boot for an rc script time ago, but if I recalled correctly, this is because
boot can't find fossil's configuration in any hard drive, so it tries to find a kfs, but
the default kernel configuration doesn't include kfs in bootdir, so it gives you that error.
Boot from the live CD and try using fossil/conf in your fossil partition to see if there is
a configuration stored or not.

Regards,
adr.