I would guess that the multi-cast route is missing, which is required for the Galil driver you're using.
We add the following line into /etc/rc.local
route add -net 184.108.40.206 netmask 240.0.0.0 dev eth0
The error simply says it could not poll the first 8 digital inputs with Galil TI (Tell input) command.
Also there is a newer Galil driver designed to replace the one your using located here:
Dr. Mark Clift
Senior Controls Engineer
800 Blackburn Road
Ph: +613 8540 4264
Fax: +613 8540 4200