C++ public inheritance [SFML] - c++

Question

I've been having trouble drawing a sprite of hero to the screen(which I solved with a different approach). Problem was caused because of inheritance. Now I'm gonna put all the code and tell the story alongside with codes.
Character.h (the parent class for hero and npcs)
#pragma once
#include <SFML/Graphics.hpp>
#include "TextureHolder.h"
using namespace sf;
using namespace std;
class Character
{
protected:
Vector2f m_Position;
int m_Speed;
public:
Character();
void spawn(int x, int y, string direction);
Sprite m_Sprite;
Texture m_Texture;
void virtual update(float elapsedTime);
};
Character.cpp has nothing except constructor and update function declerations
#include "stdafx.h"
#include "Character.h"
Character::Character(){}
void Character::update(float elapsedTime) {}
Hero.h
#pragma once
#include "Character.h"
using namespace sf;
using namespace std;
class Hero : public Character
{
private:
public:
Hero();
void virtual update(float elapsedTime);
};
And finally Hero.cpp
#include "stdafx.h"
#include "Hero.h"
Hero::Hero()
{
m_Texture = TextureHolder::GetTexture("images/chars/hero.png");
m_Sprite.setTexture(m_Texture);
}
void Hero::update(float elapsedTime)
{
}
With the classes this way, When I try to draw hero.m_Sprite it gives access violation.
As you see I'm using public inheritance from character to hero(which should have worked perfectly, since when I type "hero." it shows me list of it's public members and m_sprite is among them)
But when I try to add m_Sprite and m_Texture in Hero.h(instead of inheriting them from Character class , I got no errors.
What is the reason behind this?
Edit: draw.cpp
#include "stdafx.h"
#include "Engine.h"
void Engine::draw()
{
m_Window.clear(Color::Black);
m_Window.setView(m_MainView);
m_Window.draw(hero.m_Sprite);
m_Window.display();
}
EDIT 2: IT doesn't give errors anymore. I didn't change anything and I don't have any idea what caused and what fixed the problem.