Sane can't see Samsung CLX-3305W network scanner in Ubuntu 14.04LTS

I've installed a new Samsung CLX-3305W multifunction printer/scanner a couple of weeks ago on a dual boot system with W7 on one physical drive and Ubuntu 14.04 64-bit on a separate drive. The printer is connected via LAN, through a router and used as a network printer/scanner. Windows has no problems printing and scanning over the network however, Ubuntu will only print and won't see/recognise the scanner. I've been prowling relevant Linux forums for advice and a solution, but to date nothing worked. Ubuntu is updated and as far as I can tell, all relevant drivers are present together with sane-utils, libsane and libsane-extras. I also have Simple Scan and Xsane installed. I can get around this problem by scanning directly to a USB memory stick or booting into Windows every time I need to scan something, but not being able to scan directly to Ubuntu is driving me silly. Could someone please help me out?