If you try to run VP-ASP on your system and get a pop-op requiring userid/password, then the authentication setup is wrong but easily fixed.

When you are attempting to browse a Web page, the following error is displayed:

You are not authorized to view this page
You do not have permission to view this directory or page using the credentials you supplied.

HTTP 401.2 - Unauthorized: Logon failed due to server configuration
Internet Information Services

Solution

The Solution is to start Internet Information Services, select the directory and allow anonymous access. Use

Start/control Panel/Performance and Maintenance/Administrative Tools/Internet Information Services.

Then click to you see webs structure

Right Click on the Directory in this case VPASP, select Properties

Click Edit

Check Anonymous Access