idhttp download file problem with https

Hi
I use indi 7 and delphi 7

I try to download a file with https protocol with a function i write down,
that works with http protocol.
The files downloaded are empty (one time it downloaded a html file of the
site)
The link is something like:
https://bollettinoreport.poste.it/bollettinoreport/98331.zip?idRichiesta=98331
If i try to savetofile the link in the browser, it start the download  with
the standard IE download windows.

I fault or missed something in the function or i fault the approch??
The indy version is too old??

T.i.a.
Axel


function GetWebFile(sUrl,LnomeCompletoOut:string):boolean;
var T:TMemoryStream;
    idhttp1:tidhttp;
    FSSL          : TIdSSLIOHandlerSocket;
begin

result:=false;
  idhttp1:=TIdHTTP.Create(nil);

   if pos('https',sUrl)>0 then
   begin
   FSSL := TIdSSLIOHandlerSocket.Create(idhttp1);
   idhttp1.IOHandler := FSSL;
   end;

  T:=TMemoryStream.create;
  try
    idHTTP1.Get(sURL,T);
    T.SaveToFile(LnomeCompletoOut);
    result:=true;
  finally
  T.Free;
  FreeAndNil(idhttp1);
  end;
end;