Why do I get the login page when I try to log in to Craigslist?

I am trying to log in to Craigslist using Delphi 2010 and latest version of Indy 10, and retrieve my account page (in order to gather a listing of all my posts).

However, when I post the login details, the returned HTML is that of the login page, whereas I expect to get my account page listing my postings.

Here is my latest code:

function TfrmMain.Login: string;
var
  IdHTTP: TIdHTTP;
  Request: TStringList;
  Response: TMemoryStream;
  SSLHandler: TIdSSLIOHandlerSocketOpenSSL;
begin
  Result := '';
  try
    Response := TMemoryStream.Create;
    try
      Request := TStringList.Create;
      try
        Request.Add('op=login');
        Request.Add('redirect=http://www.craigslist.org/');
        Request.Add('login=' + edtEmail.Text);
        Request.Add('password=' + edtPassword.Text);
        IdHTTP := TIdHTTP.Create;
        try
          SSLHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
          try
            SSLHandler.SSLOptions.Method := sslvSSLv3;
            SSLHandler.SSLOptions.Mode := sslmUnassigned;

            IdHTTP.IOHandler := SSLHandler;
            IdHTTP.AllowCookies := True;
            IdHTTP.HandleRedirects := True;
            IdHTTP.Request.ContentType := 'application/x-www-form-urlencoded';
            IdHTTP.Post('https://accounts.craigslist.org/login', Request, Response);
            Result := IdHTTP.Get('https://accounts.craigslist.org/');
          finally
            SSLHandler.Free;
          end;
        finally
          IdHTTP.Free;
        end;
      finally
        Request.Free;
      end;
    finally
      Response.Free;
    end;
  except
    on E: Exception do
      ShowMessage(E.Message);
  end;
end;

I have confirmed through debugging that the email and password are correct values as they are passed in the request parameters, so why don't I get the page I expect?

Solution

According to the HTML you receive, the name of the login field is inputEmailHandle, not login. Likewise, the password field is inputPassword, not password. There are also some additional fields that you omit, including step, rt, and rp. I see no op or redirect fields in the form.

In other words, the code shown here is not code for logging in to Craigslist; it's code for logging in to Filestrum with the addresses changed around, without regard for the significance of the surrounding code.