Trying to use Timer0 on Arduino Mega

I've recently been looking at Timers and I'm trying to generate a PWM frequency at 250000Hz using Timer0 on PIN 4. When I set OCR0A = 63 I get nothing from the light however when I set OCR0A = 125 it turns on ( 128000Hz - according to the formula in the datasheet unless I've been working it out wrong). What's the reason for it not working when OCR0A = 63

#include <DmxSimple.h>


void setup() {
  // put your setup code here, to run once:
  Serial.begin(250000);
  pinMode(2,OUTPUT);  // SHIELD DRIVER OUTPUT ENABLE
  digitalWrite( 2 , HIGH); // SHEILD DE HIGH
  DDRG |= bit(DDG5); 



  TCCR0A = 0;
  TCCR0B = 0;
  TCNT0 =  0;

  TCCR0A = bit(COM0A1)| bit(COM0B1)| bit(WGM01)| bit(WGM00);
  TCCR0B = bit(WGM02) | bit(CS00);
  OCR0A = 63 ;
  OCR0B = 31;

}

void loop() {
  // put your main code here, to run repeatedly:

(1,PORTG |= (1<<5));
(1,PORTG &= ~(1<<5));


}