Hobbywing 120A V3.1 Set Up issues

[Dynamite Arrows]

Hello all,

I've just installed a new Hobbywing 120A V3.1 , wired up , and am unable to either get into set up mode or to set it up .

When holding the button down on the ESC the red light continually flashes and ESC beeps continuously , fist thing , is this right that it goes on continually ? or is something already wrong .

I don't have the set up box so am only setting up with the ESC itself .

So, assuming the above is correct , I'm pressing in neutral , holding at full speed , then press , full brake then press etc .

When I do this , the beeping and light stop , but the green light never lights and the set up does not complete .

Servo works fine and battery voltage from a 7.4v 5500 saddle is around 8.5 volts , motor is a Thunder Power 8.5 .

Any help appreciated

Peter