Enable Anonymous Access in IIS 6

What are the account requirements for aspx pages to be accessed anonymously on Windows 2003 server?.

When I view my aspx page in a browser locally or remotely I always get prompted for user and password. When I provide credentials for user in the admin group the page displays correctly.

I do not get prompted when viewing .htm files.

I would like to make the aspx pages available anonymously.

Here are my settings:

NTFS Directory Security:
Administrators - Full Control
ASP.NET Machine Account - Read & Execute, List, Read
Internet Guest Account - Read & Execute, List, Read
System - Full Control

Virtual Directory Tab:
Read - checked
Execute permissions - Scripts only

Authentication and access control:
Enable anonymous access - checked
User name: IUSR_COMPUTER_NAME
Basic Authentication - Not checked

Thank you in advance.

I don't have IIS6, sorry. In previous versions the IUSR_computername user account has to have permission granted to any files/folders used by the web site.