Epson DX4450 does not print

Hi people!
the mentioned all-in-one printer does not print nor scan, even though it’s fully recognized by YAST.
Could be a group problem? Xsane works by root.
Here’s the output of lsusb:

antonello@linux-i42o:~> lsusb
Bus 001 Device 005: ID 04b8:083f Seiko Epson Corp. Stylus DX4450

How could I fix it?
Thanks in advance!!