Hi! Happy to join and hope I’m in the right place. I have questions about my train about the tree. I set it up and the transformer worked for awhile but now isn’t. I ordered one from eBay and it is not working either. The contacts on the train are clean and so is the track. Forgive me but I have little knowledge. When I hooked the transformer to the track, one lead is blue and the other red. Does it matter which side of the track it’s on? I’ll have my husband check the ohms/voltage but I’m wondering what I’m doing wrong. Thanks for any ****!