I have an issue with private variable scope

I have wrote a program for this kind of game thing. When I go to run it, it says that a private variable declared in the class was not declared in this scope. I've wrote this program basically before and have put the code side by side but I can't see what's wrong.

Main.cpp:

#include <iostream>
#include <conio.h>
#include "Level.h"

using namespace std;

int main()
{
Level level;

level.load("2DCombatSimulatorArmy.txt");
while(true) {
        level.print();
        int t = getch();


}
cout << "Press any key to exit...\n";
int tmp = getch();
return 0;
}

Level.h

#ifndef LEVEL_H
#define LEVEL_H
#include <iostream>
#include <vector>
#include <string>

using namespace std;

class Level
{
public:
    Level();
    void Level::load(string fileName);
    void Level::print();
    void level::clearScreen();


private:

    vector<string> _levelData;

};

#endif // LEVEL_H

Level.cpp

#include "Level.h"
#include <iostream>
#include <fstream>
#include <conio.h>
#include <cstdio>
#include <cstdlib>

using namespace std;

Level::Level()
{
//ctor
}



void Level::clearScreen() {
for(int i = 0; i < 50; i++) {
    printf("\n\n\n\n\n\n\n\n\n\n");
}
}

void Level::load(string fName) {

// Loads the level into a vector
ifstream file;

file.open(fName);
if(file.fail()) {
    perror(fName.c_str());
    cout << "Enter any key to continue...\n";
    int tmp = getch();
    exit(1);
}

string line;

while(getline(file, line)) {
    _levelData.push_back(line);
}
file.close();


 print();
}



void Level::print() {
clearScreen();
for(int i = 0; i < _levelData.size(); i++) {
    printf("%s", _levelData[i].c_str());
}
}

The problem I'm getting is that _levelData is 'not declared in the scope'. I'm not that great with C++ but I have a rough idea with it but this bug is annoying me and I can't seem to get a concrete answer.