Could anyone please help me figure out why my Oliver just stopped working entirely today during my running session. He was working just fine, then all of a sudden, stopped. It's like his wheels are locked up. I got him to run very briefly in reverse on my wheel cleaner, but when I tried to switch to forward, it stopped again. I ran all the engines on the track cleaner while I was getting all my rolling stock out. Any suggestions? I don't wanna have to completely replace him if I don't have to