Reinald; I don't mean to be insulting, but did you remember to change snapscan.conf to point to the newer version of the firmware file? Also, depending on your particular installation, the firmware (along with the .conf file) may need to be in either /usr/local/etc/sane.d or /etc/sane.d. Because of all the testing I did of different vesions of everything, I wound up with files in both places and it took me a few tries to realize that my current installation is looking for the firmware and the conf file in /usr/local/etc/sane.d. instead of in /etc/sane.d
Hope that helps. ken