I just picked up the XMODS Radio Shack Barricade. It's a pretty sweet RC car, but I've got a problem with the add-on light kits. I bought the Police Light and regular head/tail light kits and after installing both of them only the head light kit kicks on and not the police bar. If I unplug the headlight mod, the police bars work fine. Anyone know enough about these cars to help me out? Will it only run one light kit at a time?