AOBScan returning null

char BytePattern[] = "\x89\x00\x00\x8B\x00\x00\xFC\xFF\xFF\x85\x00\x0F";
char ByteMask[] = "x??x??xxxx?x"; //Our Mask

FindPattern("Game.exe", BytePattern, ByteMask);

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
#include <Windows.h>
#include <iostream>
#include "Functions.h"
using namespace std;

#pragma comment( lib, "psapi.lib" )

//Define all Here, its easier.
char BytesToPatch[] = "\x8b"; //What we are replacing with, for example \x90\ = NOP.
char BytePattern[] = "\x89\x00\x00\x8B\x00\x00\xFC\xFF\xFF\x85\x00\x0F";
char ByteMask[] = "x??x??xxxx?x"; //Our Mask
int Position = 0; //0 means first.
int NoOfBytes = 1;

//Our Main Function
void InitiatePatch()
{
 DWORD ammoAddy = FindPattern("Transformice.exe", BytePattern, ByteMask);
	MessageBoxA(NULL, BytePattern , "",0 );
	MessageBoxA(NULL, ByteMask , "", 0);
	MsgBoxAddy(ammoAddy);
	WriteToMemory(ammoAddy, BytesToPatch, 1);
	}


BOOL WINAPI DllMain(
    HINSTANCE hinstDLL,  // handle to DLL module
    DWORD fdwReason,     // reason for calling function
    LPVOID lpReserved)     // reserved
{
    // Perform actions based on the reason for calling.
    switch(fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            // Initialize once for each new process.
            // Return FALSE to fail DLL load.
            MessageBoxA(NULL, "Attached successfuly", "", 0);
            InitiatePatch();
            break;
    }
    // Successful DLL_PROCESS_ATTACH.
    return TRUE;
}

#pragma comment( lib, "psapi.lib" )