Single Authorization with html in Forms Authentication

From: Andy Beck (andrew_beck@sra.com)
Date: 08/22/02 

From: "Andy Beck" <andrew_beck@sra.com>
Date: Thu, 22 Aug 2002 17:14:04 -0400

It only asks me for authentication 1 time with forms authentication on html
files when I've mapped them to the aspnet_isapi.dll. Am I forgetting to set
something?