Considering you just bought it I would return it or contact Lionel for service.
From Lionel's web site
Before you call, take a moment to view the simple checklist below and have the answers to these questions readily available. It will help us to serve you quickly and efficiently.
1. What is your product number(s)?
2. Where was it purchased (s)?
3. Was it purchased within the last year?
If not, then we recommend taking it to your local authorized Service Station.
4. Do you have a receipt?
(Your receipt is your proof of warranty)
[h=4]By Phone or Fax[/h]Phone: 586-949-4100, ext. 2