blinking

Hi, i am just putting the electronics into a FT Mighty Mini Arrow. I have a Spektrum Dx6i (with AR6200) and just got a RS20A 20A BLHELI_S. ESC. I wired it up as I had before (with a much older and chunkier ESC) but now my receiver is not blinking at all. The ESC beeps as I plug a battery in...