[edubuntu] Epoptes issue

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http://ubuntuforums.org – Fresh Edubuntu 12.04 install all updates completed school network of 20 PCs Ethernet cable network with Internet connection working fine. DHCP router working fine Epoptes client on startup applications folder in all PCs Epoptes server application started on teacher's PC No LTSP installed Epoptes application doesn't see any computer at all. Epoptes window interface is very poor and documentation on the internet is even poorer or too specifical. I don't really from where to start to fix this, I guess, stupid issue. (Hardware)