Hi; I have a Roundhouse 'Old Timer' 2-6-0 mogul and for some reason it will not run over the tracks properly. I don't have a problem with my diesel loco's but this steam engine seems to stop and start on the track; sometimes not starting, sometimes starting then stopping. I did put one of those Trix wheel cleaners on the track then place the loco on to it and it went great. but put it back on the track proper and problems. Would appreciate any help in getting this item working properly as it is a decent unit.