아래와 같은 소스를 입력하면 아래와 같은 오류가 발생합니다... 어떻게 하면 해결될까요..? 부탁드립니다...

소스:

#include<hid.h>
#include<hiduhiversal.h>
#include<Usb.h>
#include<usbhub.h>
#include<avr/pgmspace.h>
#include<hidboot.h>

#include<Keyboard.h>

#include<LiquidCrystal.h>
#define DISPLAY_WIDTH 16

LiquidCrystal lcd(9,8,4,5,6,7);

USB Usb;

HIDBoot KEYBOARD(&Usb);

class KbdRptParser : public KeyboardReportParser
{
  void PrintKey(uint8_t mod, uint8_t key);
  protected:
  virtual void OnkeyDown(uint8_t mod, uint8_t key);
  virtual void OnkeyDown(uint8_t key);
};
void KbdRptParser::OnKeyDown(uint8_t mod, uint8_t key)
{
  uint8_t c = OemToAscii(mod, key);

  if(c)
  {
    OnKeyPressed(c);
  }
};

void KbdRptParser::OnKeyPressed(uint8_t key)
{
  Static uint32_t next_time = 0;
  Static uint8_t current_cursor = 0;
  if(millis() > next_time){
    lcd.clear();
    current_cursor = 0;
    delay(5);
    lcd.setCursor(0,0);
    keyBuffer = "";
  }
  next_time = millis() + 200;

  if(current_cursor++==(DISPLAY_WIDTH + 1)){
    lcd.setCursor(0,1);
  }
  keyBuffer = keyBuffer + key;
  Serial.println(KeyBuffer);
  if(keyBuffer.equals("11111"))
  {
    lcd.print("ok");
    keyBuffer = "";
  }
  else if(keyBuffer.equals("22222"))
  {
    lcd.print("No");
    keyBuffer = "";
  }
};
KbdRptParser Prs;
PS2Keyboard keyboard;
void setup() {
  Serial.begin(9600);
  Serial.println("start");

  if(Usb.Init() == -1)
  {
    Serial.println("OSC did not start.");
  }
  delay(200);

  keyboard.SetReportParser(0, (HIDReportParser*)&Prs);
  lcd.begin(DISPLAY_WIDTH, 2);
  lcd.clear();
  lcd.noAutoscroll();
  lcd.print("Ready");
  delay(200);

}

void loop() {
  Usb.Task();
}

오류:

ketch_3:22: error: no 'void KbdRptParser::OnKeyDown(uint8_t, uint8_t)' member function declared in class 'KbdRptParser'

sketch_3:32: error: no 'void KbdRptParser::OnKeyPressed(uint8_t)' member function declared in class 'KbdRptParser'

C:\Users\?넀?닕寃?\Documents\Arduino\program\sketch_3\sketch_3.ino: In function 'void setup()':