체크박스가 클릭되면 이미지가 보여주고 해제되면 이미지를 지우고 싶은데 안되네여

이게 맞는거 아닌가여
    if(GridFrmOld->Cells[VF_IMAGEYN][ARow] == "Y")
    {
     try
      {
        dlgImgOpen->Filter = "Bitmaps (*.bmp)|*.bmp";
        if (dlgImgOpen->Execute())
        {
          Graphics::TBitmap* bmp = new Graphics::TBitmap;
          bmp->LoadFromFile(dlgImgOpen->FileName);
          GridFrmOld->Cells[VF_FILEPATH][ARow] = dlgImgOpen->FileName;
          BGImg->Picture->LoadFromFile(dlgImgOpen->FileName);
          BGImg->Parent = PanelFrameOld;
          BGImg->Align  = alClient;
          delete bmp;
        }
      }
      catch(...)
      {
      }
     if(GridFrmOld->Cells[VF_FILEPATH][ARow] == "N")
      {
        BGImg->Picture->Bitmap = NULL;
        GridFrmOld->Cells[VF_FILEPATH][ARow] = "";
      }
      }