Over the last year I have downloaded 4 or 5 0-6-0 type steam locos from the download station, the latest being the B & O 0-6-0 #353. Each of them appear to have been downloaded OK, show up in the Railyard list, but display no image when selected. When I try to place one on track in Surveyor it will not appear. The corresponding tenders do work and can be placed on track. Whats's wrong?