If you are using the Novak ESC, something is not set correctly. I believe it should go green for full throttle and blinking green for full break. It should be red at neutral. Try resetting the ESC if it is a Novak. If it is one of the newer Novaks remember that now you press and hold the setup button before you turn on the ESC not like you used to do it.
If you are using Novak HV ESC, with a single batt, you must jump the second set of batt wires on the ESC. The instructions that come with the HV will tell how.