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“I recently purchased a Walthers Mainline GE ES44 Evolution Series GEVO diesel locomotive with DCC and sound. I am currently facing an issue when attempting to change the short address (*CV1*) from the default value of 3 to another number. I am using a Digitrax DCS52 (Zephyr Express). When I attempt to write a new value to CV1, the system shows the operation as “Done,” but the locomotive still responds only to address 3. Additionally, when I use the CV programmer menu, it successfully reads CV values, but when I attempt to write, it shows ‘no pulse acknowledge.’ I’ve confirmed proper track and wheel contact, and the other decoders program is fine using the same system. Could you please advise if there is a known issue with CV writing on this unit or if any special programming method is required for this model?”