I have a Zero 88 BetaPack with built in DMX controller, and a Horizon 24 Channel hard wired dimmer rack, again with a built in DMX controller, but with a different connector. I have managed to connect a standard 5 pin XLR connecter to the Horizon so that I can use it with the BetaPack and have control of all 30 channels from one desk. Currently I have my Strand MX desk, which has been tested on a fully working rig and works faultlessly, and a cheapo lighting desk at the school where the Horizon is. Now for the problem..... When I plug in the cheapo desk into the Horizon and run a cable to the BetaPack I get a signal all the way down, and can control the lights on the BetaPack if I set the start address to under 24. This is fine, and works, but the desk is not software patchable and does not include any effects programming features, (which would be useful as I am running a dance show). However, if I plug the MX into the same line, all goes downhill and the signal drops. If the MX is plugged straight into the BetaPack though, lo and behold the betapack works, but as soon as the cable between the BetaPack and the Horizon is plugged in the signal is dropped. Also if the MX is plugged straight into the Horizon, there is no signal to the Horizon board. :? If anyone has any bizarre, random or even sensible ideas on how to make it work it would be most appreciated, as I havent got enough hands to control two desks at once so that I have control of both desks!!!