14.04 - Epson SX235W scanner no longer detected via wifi - Ask Ubuntu

i on ubuntu 14.04 lts machine, regularly updated.
downloaded year printer , scanner drivers epson stylus sx235w epson download page. scanner driver version 1.0.0 (iscan-bundle-1.0.0.x64.deb.tar.gz).
device has dedicated static ip in router: 192.168.0.102
once installed all-in-one device worked fine via wifi until recently: printer still works before scanner no longer recognised.
used use simple scan because image scan! epson utility did not work (probably because uses backend epkowa not configured properly.)
simple scan not work more:

failed scan no scanners available. please connect scanner 

the output of scanimage -l is:

asarluhi@satellite-l50-a-161:~ $ scanimage -l  no scanners identified. 

i tried install sane, not installed default, xsane not detect scanner: no devices available.

with usb cable connected there no relevant issues, problem suppose wireless network communication scanner.
usb cable, scanimage -l output is:

asarluhi@satellite-l50-a-161:~ $ scanimage -l device `epkowa:usb:003:003' epson stylus sx235w/nx230/tx230w series flatbed scanner 

the issue that, said before, being epkowa backend not configured, simple scan did job. xscan returned failed open device 'epkowa:usb:003:003': device busy.

i tried edit file etc/sane.d/epkowa.conf adding following line:

net 192.168.0.102 

with change, wireless network communication, when launch scanner utility or scanimage -l process requires more time produce response, result still same:

simple scan:

failed scan unable start scan 

xsane

no devices available 

what suggest do?

are sure firewall not blocking connection? had similar issue solved changing ufw settings. can tested by:

root@joker:~# ufw status status: active root@joker:~# ufw disable firewall stopped , disabled on system startup  joker@joker:~$ scanimage -l device `epson2:net:aaa.bbb.ccc.ddd' epson pid 0885 flatbed scanner