Santa brought his first ho gauge train to our house this year.  We have several o gauge and are planning to expand our layout.  After setting up the boxed layout the engine only moves well in one direction ... When the direction selector is pointing left.  Regardless of the direction of the engine (forward or reverse) when the arrow selector is in the right position the engine barley moves at all.  Is this an equipment issue or is it an operator (human) error?