This is the first time I've ever set up a train. I have a Bachmann B&O steamer with a tender. I'm running it on EZ track. I have 2 straight runs, one 18" turn and one 15" turn. There are some minor grade changes. As long as I only run the engine everything is fine. But when I manage to add the tender (which is a WHOLLLLLE 'nother issue), it inevitably derails. The cars are so small and the track so narrow that I'm not even sure I have the cars on the rails correctly. I'm so frustrated because I've been at it for hours and all I have to show for it is a dismantled Christmas village and a broken curtain rod. Help!