This is my first post in the forum and I am a newbie for Linux. So please be specific about the command lines if you have suggestion for my problem.

I flashed Arch Linux Arm on my Pogoplug Pro device following the instructions on archlinuxarm.org and had no problems. My main goal is to use the hacked pogoplug as a scanner server for our home. I had a brother MFC-6800 printer/scanner combo.
So I installed sane first using "pacman -S sane".
Then I followed the instruction here: https://wiki.archlinux.org/index.php/Brother_MFC-420CN.
The instruction above is for a different Brother scanner but the methodology applies to my scanner. I just need to use the right driver for my scanner. Also, since I do not plan to use the printing function, so I skipped the printer setup part of the instruction, except for installing "rpmextract".
Then I jumped directly to the scanner setup section and followed along. My scanner is MFC-6800 so I downloaded the driver "brscane 32bit" from brother website" http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_scn.html. Everything else I just did what the instruction says.
After all of the above, I ran the command "sane-find_scanner" and I got the following:
$this->bbcode_second_pass_code('', '
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
# Also you need support for SCSI Generic (sg) in your operating system.
# If using Linux, try "modprobe sg".
found USB scanner (vendor=0x04f9, product=0x0111) at libusb:001:004
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
')
That means the scanner was found. Then I ran the scanner test command "scanimage -L". And I got:
$this->bbcode_second_pass_code('', '
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
')
It looks like I did not get the driver installed correctly. Can you provide some insight to troubleshoot this situation? Any suggestion is appreciated.