使用BCB 的TiniFile类产生的一个错误。。。没看懂哪错了

//---------------------------------------
#include <IniFiles.hpp>
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{

       String ThirdConfig="D:\\ETCSimulator\\ThirdConfig.ini";
       TIniFile* regKey=new TIniFile(ThirdConfig);
        regKey->WriteString("Simulator","RSUInitScripts","no such key");//这行出错
        regKey->WriteString("Simulator","SendHeartBeat","no such key");
        regKey->WriteString("Simulator","RsuKeepTime","no such key");
        regKey->WriteString("Simulator","HeartBeatScript","no such key");
        regKey->WriteString("ComMap","ComMap1","no such key");
        regKey->WriteString("ComMap","ComMap2","no such key");
        regKey->WriteString("PlateReg","RegIndexList","no such key");
        regKey->WriteString("IOCard","UseIOCard","no such key");
        regKey->WriteString("IOCard","iocontrol","no such key");
        regKey->WriteString("IOCard","ioCardDll","no such key");
        regKey->WriteString("IOCard","GDBITS","no such key");
         delete(regKey);

}

错误是：无法写入d:\\ETCSimulator\\ThirdConfig.ini文件 TiniFile

[解决办法]
目录d:\\ETCSimulator存在吗？
[解决办法]

 TIniFile* regKey=new TIniFile(ThirdConfig);
// 1 确定上面的初始化操作是否成功！检查返回值

// 2 确定你在当前用户下是否对该文件有写操作权限！