I recently purchased an NCE system. I have test run about a dozen locomotives and have successfully reprogrammed them in accordance with the instruction manual. I have three Atlas locos that have the dual mode decoder. I can only run them if they are programmed with the initial factory settings. Since the Three locos each have the same setting, it's a little frustrating. I don't have this problem with any other type of decoder. Does anyone have any thoughts about this problem or has anyone else had a similar experience? Thanks in advance for your thoughts.