I purchased the Commander DCC set when it first came out, (the one with the GP38, and the F unit. I was using the bachman DCC system on my layout, but I recently switched to a MRC system, and the two locos dont work with it. My spectrum loco still runs after I switched, its just those two locos, any idea what happened? 

I have a larger layout that had a EZ command DCC system with the reverse module that worked fine. I recently switched to a MRC system, but now whenever a loco enters  the loop it the sytem shorts. I put a coin over the gaps, and the module clicks so it works, any ideas what to do? 

Hi everyone, I am a memberover at the Guage forum and was told to come here for help.
I have two Athearn SD45T-2 locos and just got two decoders for them, Digitrax DH163AT, and DH123AT, I wanted to of the same but did not think it would make a difference.
The two locos now have different operating and start speeds in relation to the controll knob on my DCC system.
I want to MU the locos but it is impossible with the speed, I was told to reprogram the CV's and that my EZ-Command DCC system was not capable of this, what do I do?