First of all Thanks for your responses.   Secondly, it is a DCC On Board and states to be used with Dynamis EZ Controller which I have.   So back to square one!  Don't know what is meant by resetting Decoder?

It was on 03 for the Steam engine so thought it would run as set.   Do you think there is a problem with the Deisel engine?

My controller is on 03 for the steam engine, that's why I thought it would run the Deisel.   Do you think there might be something wrong with the Deisel engine?

Have been running Bachmann DCC with a steam locomotive.   Just got a DCC Deisel engine for Xmas.   Says totally compatible but hardly moves and won't move when hooked up to other cars....just buzzes.   Controller guide says to input new train address.  Don't know how to find address of Deisel engine???   What do I do??