Quote from: nfmisso on March 17, 2013, 07:21:33 PMno no no he is only using one engine at a time and none are working suddenly.
Sounds like you are trying to run both engines at the same time on the same track. The power pack that came with the train sets does not have sufficient power to do this; it will get hot, stinky and the overload protection will trip.
There are many choices for running multiple engines at the same time. I would suggest that you look into DCC. An alternate choice is called "block control", which has been around for more than 50 years. DCC has been around for more than 20 years, and is a well established standard.