I bought two new in the box Bachmann Medium Vanderbilt Tenders Marked DCC ready. I also have two New DCC ready Bachmann 2-8-0 Consolidations that I have used on my small layout. I wanted to use these new Vanderbilt tenders with my 2-8-0 s and found that the position of the plugs in the Vanderbilt tenders was reversed from that on the ones in the tenders that came with the 2-8-0s . After getting them all plugged in and hooked up the engine won't run. The engine only runs with the tenders that came with it. Everything is marked DCC ready. What am I doing wrong . I am new at all this DCC Tech.    Tony