i am building a dji450 clone, it has kk2.1 flightboard , 4 x spider k 30a ESC , 4 x turnigy multistar 2213 motors ,orange 2615 rx and spektrum dx6i , have connected the battery and nothing ...no power to the flight board , all i get is a beeping from the ESCs ... it beeps once every 3 or so...