The device is recognized as a scanner but I can't scan.
FAQ ID : LS00013
Created : 2009.06.12
Last modified : 2009.09.04
The various GNU/Linux distributions all use different policies when it comes to accessing scanners. Please refer to the information provided by your distribution for details.
On quite a few distributions you can solve this by adding yourself to a certain group, often "scanner" or "lp". There is probably a "Users and Groups" entry somewhere in your menus that let's you do that. You can also try the command line.
# adduser $user $group
or
# usermod --append --groups $group $user
or
# usermod -A $group $user
Of course, substitute $user and $group with values that match your situation.
You will have to log out and back in again to make these group membership changes take effect.