[ianrutherford1975]

hi, i am new to train modeling and really need some help. i have a bachmann class 66 and it worked ok when i first got it. now when i put it onto the track it starts powering up as soon as the wheels touch the track and all the lights come on both directions at once but the train cant be controlled or registered on my controller.. on the underside of the train it has a on/off switch which doesnt change anything. could anybody please help.
Thanks Ian