I've followed the directions in this scenario to the letter. The train is connected to power, the doors are closed, the e-brake is off, reverser is set to Forward. However when I open the throttle....nothing happens. The train does not move. Strangely, if I then apply any amount of brake a warning goes off that I can't identify. It's just a steady repeated beep that never shuts off. I'm at my wits end with this. I fully admit that I'm not an expert at this game. I'm a filthy casual. I play this game - and exclusively the high speed lines - because "train goes zooooom". But up until this particular DLC pack, I'd never run into any issues and felt the tutorial and step-by-step guides in-mission were such a great feature specifically for people like me. I've included screens of the console, if that'll help someone smarter than me figure out what the frack is wrong.
Press the Pan Up/Shoes Down button under the DC switch on the panel again and the MCB light should go out. Only the line light should be on.