Sprinter Speed controller
 

Hi
ive had a Sprinter electronic speed controller for a few years now but for some reason everytime i unplug the battery and plug it back in again the speed controller like resets itself so then i gotta keep setting it back up again, its really starting to get anoying.
if anyone may know why this is happening and knows how to fix it, it would be greatly appreciated
[link]http://www.hpcmodelsports.com/Image%20folder%201/speedo/sprinter.gif[/link]

thanks
tux