i have an installation of sarge with kernel 2.6.8.2, and a scanner (usb) attached to the system. the thing is that the scanner does not get recognised correctly by the system. when i do scanimage as root or a user i get error:
#root
arispc:~# scanimage
[gt68xx] Couldn't open firmware file (neither `/usr/share/sane/gt68xx/PS1fw.usb' nor `/usr/share/sane/gt68xx/ps1fw.usb'): No such file or directory
scanimage: open of device gt68xx:libusb:002:003 failed: Invalid argument
arispc:~#

#user
aris@arispc:~$ scanimage
scanimage: no SANE devices found
aris@arispc:~$

although when i do scanimage -L
#root
arispc:~# scanimage -L
device `gt68xx:libusb:002:003' is a Mustek BearPaw 1200 CU flatbed scanner
arispc:~#

#user
aris@arispc:~$ scanimage -L

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).
aris@arispc:~$


anybody got any idea how to solve this problem?

1. check that sane-find-scanner can see the scanner
2. check that the required files do not require root permissions.

this is all in the documentation for sane-find-scanner and scanimage - there is also a faq on the sane project page.