I have a 90-0100 that I cannot get to run. I have installed fresh batteries all around, the Transmitter LED shows a red light, but to no effect on the engine. There is no response when moving the forward backward switch and there is no sound from the tender. Am I missing a switch because I have tried the 2 at the back of the engine several times.  I would appreciate any help or hints. Thanks, pk

I have a used 90-0100 R/C that I cannot get to run. I have inserted new batteries both in the engine and a 9 volt in the tender. The R/C transmitter LED is showing red, however, the engine does not run nor does the sound work. Help! and thanks.