How To Include An Old-ASP Within My New-ASPX

I've got and old ASP script that works Ok, but I want now to
include it within a new ASPX script I've just created with '.net'.

The process could be:

<%@ Page Language="VB" %>
<%
... aspx code ...

include my old ASP script
%>
I'm newbie in ASP, and would be extremely obliged if anybody could
tell me how I must write it. I've tried with

Code:
<!-- #Include File="old-script.asp" -->
and

Code:
<% Server.Execute("old-script.asp") %>
but it doesn't work.