For other DLC, 766.2 runs OK but in rapid transit route 767 is broken. Include training, senarios and timtable. The train cant not throttle up and the right level display "red", not "white". Is it a bug?
This sounds like you may have applied brakes or something while the throttle is still in “Min”, so when you increased the throttle again, it didn’t do anything. In this case, be sure to return the throttle to 0 before reapplying it. You may have to wiggle it between Min and 0 for it to work.
I've experienced same things on dcz and dra. It doesn't depend on the route but the version of the cab car as it seems. It's weird as you going into braking, throttle is off (not in 0 Position). After releasing the brakes completely, the throttle is blocked (red square). Maybe it's supposed to be but this would be weird as well as not all dosto cab cars does this. Just another thread that shows the mess with all the different versions. At least DTG could mark them properly (like DB 766 RSN, DB 767 DCZ) and so on. Same goes for all the locos.