Thank you Kevin for the information. Well, I tried the wheels, they are a little stiff, but they do roll when I lightly push the locomotive on the track. I am hoping I dont have to open the unit(if so, this would be the 9th or 10th time that I have opened and close the unit), but I will not find that out until next tuseday, when I get my new NCE PB110 10A Booster. Then, I can try out the start up function key, and hopefully it will do the trick. I am somewhat skeptical that would solve the problem, since the locomotive never moved, not even once since I installed the decoder, even though the lights and sound were functioning. I will keep you guys posted. Thank you guys for all your help.