Make sure you plugged them in the right way. If all you're getting are ESC beeps and no activity (lights or anything) from the FBL controller then you may have plugged in the throttle cable (and others) in the wrong direction/polarity. A Picture would help a lot here. YOu need to be careful, depending on what you have for an FBL controller it may not have polarity protection and may burn out if you plug these in the wrong way.