irc problem

I have three tills:
1. tx 870-06 v1.09 boot rom 1.02
2. dx 890-06 v1.10c boot rom 1.02
3. dx 895-06 v1.14 boot rom 1.02
all three are conected by eternet, i can send program info,do irc reports between them all
but only tills 1 and 2 will transfer tracks/float clark every time till 3 trys to pickup a track i get message ecr3 off
all irc flags are set the same all have unique ip and irc numbers and are in the same location

Is there anything i may have missed in the setup? is till 3 comatable with the other two?

many thanks Paul