[squid-users] Squid and NTLM Authentication

We are using squid-2.5.STABLE12-18.12

When trying to access this web page from home it prompts me for NTLM Authentication credentials:

http://www.allianceenterprises.com/AWAREInfo

---
When I do it from work (behind Squid), I get this error:
You are not authorized to view this page
You do not have permission to view this directory or page due to the access control list (ACL) that is configured for this resource on the Web server.
Please try the following:
    * Contact the Web site administrator if you believe you should be able to view this directory or page.
    * Click the Refresh button to try again with different credentials.
HTTP Error 401.3 - Unauthorized: Access is denied due to an ACL set on the requested resource.
Internet Information Services (IIS)
Technical Information (for support personnel)
    * Go to Microsoft Product Support Services and perform a title search for the words HTTP and 401.
    * Open IIS Help, which is accessible in IIS Manager (inetmgr), and search for topics titled About Security, Access Control, and About Custom Error Messages.
----
I'm thinking that Squid doesn't know how to handle NTLM authentication?  Any ideas?