I have recently unpacked all my N gauge locos and rolling stock (thinking about selling them on ebay). I decided that it may be worthwhile to test them so I purchased some brand spanking track and a controller. When I set it all up the motors on my locos spun but they would not move the wheels. I stripped down a diesel shunter and cleaned it before reassembly, but it resolutely stayed as stationary as a Virgin train. These locos have been in boxes for the last 10 - 15 years. Could anyone tell me why they won't move? Is it something to do with the magnets weakening? Would appreciate any help you can offer. Neil Addendum: I thought it may be a problem with the controller so I used a 12V power adaptor and placed the bare wires directly on the track and then on the wheels of different locos to no avail.