Hey gang! Long time lurker, first time I've posted in the O Scale Forum. I've been in N scale for years and decided to buy some O scale just to have on the shelf in my office. Then I decided I wanted to run them a little. Then I set up tables... and now I'm waiting on the UPS guy to bring me more! Anyway, I'm not here to talk about my sickness. I just bought my first accessory, a Lionel crossing with flasher (no gates). Out of the box it does not flash. It either lights up one side or both at the same time and stays that way. It only lights up when the train hits the sensor (the track) and shuts off after the train passes. Bell works fine too. Should I send it back or is there an easy fix?