Delphi Indy tcp server

Hello.

I try to create an application
that takes all  data from a printout and save to a uniqe filename (or insert into a database)

it seems to work  as long as I don't try to print two documents at the same time.
How can I solve this...

My code::


 private
 
    sl : TstringList;
    MyDataStr : string;



.....


procedure TfForm1.IdTCPServer1Connect(AContext: TIdContext);
begin
   sl :=TstringList.Create;
  MyDataStr:= '';

end;

procedure TForm1.IdTCPServer1Disconnect(AContext: TIdContext);
begin
  sl.Text:= MyDataStr;
  sl.SaveToFile(MyDir+ \GetUniqeFileName);
  sl.Free;
  end;