Train wagon didn't go past through curve track

I builted a curve rail track with an plugin, but the wagon didn’t go past through curve track away. I always show in my video, so watch this:

So, I curved a rail track with an plugin already. But how train wagon go past throught curve track without derailment?

this two images will explain you all
TurnoutDiagram
manually-operated-switch

Yes, the train wagon rolling certainly, but not the correct wagon glider. I have shown the rope constraint in the coupling hook, but the size is too small. How can I resize that locomotive can pull with a long-size rope constraint?

wait, where did you show a rope constraint?

There is a rope constraint: