warning C4786: 'std::_Tree

Hi,

am using vc 6.0 on windows 7 while using map its show 100 warnings in the program
this is my code.
#include "stdafx.h"
#include "Test.h"

#include <windows.h>
#include <string>
#include <iostream>
#include <utility>
#include <fstream>
#include <list>
#include <map>
#pragma warning (disable : 4786)
using namespace std;
int main(int argc, char *argv[])
{
    map<string, string> strMap;
     
    strMap["Monday"] = "MD";
    strMap["Tuesday"] = "TD";
    strMap["Wednesday"] = "WD";
    strMap["Thursday"] = "THD";
    strMap["Friday"] = "FD";
    strMap["Saturday"] = "SD";
    strMap.insert(pair<string, string>("Sunday", "SUD"));
    strMap["Sunday"] = "SUN";

    string found_val;
        map<string, string>::iterator it = strMap.find("Monday");
        if( it != strMap.end() )
        {
        found_val = it->second;
        cout<<"\n\nFound : "<<found_val;
        found_val.append("-NewValue");
        strMap["Monday"] = found_val;

        }
        else
        cout << "Key not found!\n";

  
   for (map<string, string>::iterator p = strMap.begin( );
    p != strMap.end( ); ++p ) {
        cout << "English: " << p->first<< ", #: " << p->second << endl;
    }

 
    return 0;

}

thanks,