Same problem with my Blink Bonnie, second time out of the box and stalling on curves (oval of track), ok backwards, stalling forwards about the same place which is a couple of curves pass the points and power track, reconnected the power track and thought it was cured, 5mins later stalling again. Also Pullman coach wheels scraping on curves, and track on slight outward camber, on a perfectly flat surface, reporting to Hornby and see what they say. Not a happy chappie!