Loading jpg image to LCD

[lamfan]

#include <M5Core2.h>
#include <SD.h>

void setup() {
  M5.begin();         
  if (!SD.begin()) {
    M5.Lcd.println("SD card initialization failed!");
    return;
  }
  M5.Lcd.println("SD card initialized successfully.");
  M5.Lcd.drawJpgFile(SD, "/email.jpg"); 
}

The image is not loading on the lcd.
320x240 rgb jpg format.

anything I miss? please help! Thank you!