I have used them on a MLC16. Have you used them before? They may be setup to take martins
protocol instead of
DMX.
Martin protocol reverses pins 2 and 3 so that 3 is hot and 2 is
ground. Also you need to make sure you have the dip switches set properly. you could be one
channel off or something like that. Also try not using the
terminator and see if things start to work. I really dont use terminators very often.