We purchased our first Bachmann set (the Cargo King seen at: http://www.amazon.com/Bachmann-Cargo-Complete-Ready-Electric/dp/B0045J9CWE/ref=sr_1_1?ie=UTF8&qid=1294343424&sr=8-1) over the holidays and it ran great for two days.  On the third day, we went to run it and when we turned it on we could hear the power going to the engine but it doesn't move, not a smidge.  After 8-10 seconds of this sound, the remote shuts itself off.  I've tried it many times and have moved the engine to different spots on the track and made sure that the wheels are on the track correctly, and checked over the tracks and the wiring for any noticable culprits to no avail. 

I'm hoping this is something easy to figure out and to learn a lot here on the forums over time.  I appreciate any suggestions you may have.