I run two car dmu loco's with the same address in the driving loco and trailing car to run the coach and directional lights, this works ok with railcom turned off,and will not with it turned on the ESU ECoS will not let me run two decoders of the same address. The problem is I run my layout with RR&CO and the new V5 loksound decoders will not work with railcom turned off via RR&CO? the problem only came to light when I had a new loco with v5 decoder.