IdHTTP Component - Error when Calling Get Method for Https URL

I'm trying to automate the task of downloading a file from a https web site.
I'm just starting out and using the Indy IdHTTP component to try to send
a Get request to the URL.  My problem is that I get the following error:

"An existing connection was forcibly closed by the remote host" when the
Get method is called.  I've done a considerable amount of research on the
web in the process of getting to this point and have taken into account the
following factors:

Setting the Linger Socket Option
Assigning a IdSSLIOHandlerSocketBase to the IdHTTP.IOHandler
Downloading the required SSL dll's and saving them into my application root
directory

The relevant parts of my code are below:

It is the ReturnedPage:= https.Get(URL); line that generates the error.
................................


  TMyIdSSLIOHandlerSocketBase = class(TIdSSLIOHandlerSocketBase)
  protected
    FLinger: Boolean;
    procedure DoAfterBind; override;
    procedure SetLinger(Value: Boolean);
    procedure SetLingerOpt;
  public
    property Linger: Boolean read FLinger write SetLinger;
    function Clone :  TIdSSLIOHandlerSocketBase; override;
    procedure StartSSL; override;
  end;

........................


procedure TMainForm.Button1Click(Sender: TObject);
var
  https: TIdHTTP;
  URL: string;
  ReturnedPage: string;
  SSLIOHandler: TMyIdSSLIOHandlerSocketBase;
begin
  SSLIOHandler:= TMyIdSSLIOHandlerSocketBase.Create;
  SSLIOHandler.Linger := true;
  URL := 'https://advisers.macquarie.com.au/security/login.html';
  https := TIdHTTP.Create(nil);
  try
    https.IOHandler := SSLIOHandler;
    TMyIdSSLIOHandlerSocketBase(https.IOHandler).URIToCheck := URL;
    ReturnedPage:= https.Get(URL);
    MessagesMemo.Text := ReturnedPage;
  finally
    https.Free;
    SSLIOHandler.Free;
  end;
end;

{ TMyIdSSLIOHandlerSocketBase }

function TMyIdSSLIOHandlerSocketBase.Clone: TIdSSLIOHandlerSocketBase;
begin
  inherited
end;

procedure TMyIdSSLIOHandlerSocketBase.StartSSL;
begin
  inherited
end;

procedure TMyIdSSLIOHandlerSocketBase.DoAfterBind;
begin
  SetLingerOpt;
  inherited;
end;

procedure TMyIdSSLIOHandlerSocketBase.SetLinger(Value: Boolean);
begin
  if FLinger <> Value then
  begin
      FLinger := Value;
      SetLingerOpt;
  end;
end;

procedure TMyIdSSLIOHandlerSocketBase.SetLingerOpt;
begin
  if BindingAllocated then
  begin
    if FLinger then
      FBinding.SetSockOpt(SocketOptionLevel.Socket, SocketOptionName.Linger,
1)
    else
      FBinding.SetSockOpt(SocketOptionLevel.Socket, SocketOptionName.DontLinger,
1);
  end;
end;

Regards,
David Compton
mailto:david.w.compton@gmail.com