castle ice lite 50A PHOENIX

good evening, I have an esc of the castle phoenix ice lite 50A. I connect the battery and the motor emits only 2 beeps, then everything is silent. current to the servos arrives, it simply does not read the cells and does not let me enter the programming phase. via pc I have modified all the parameters but it does not start. I have already tried to increase the trim the throttle and reverse the throttle but not ce to. does anyone know this esc well? thanks in advance to those who help me
 
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