Windows Compliance Check Problems

I'm hoping someone can figure out something that I'm missing when trying 
to get the Windows compliance checks working (UNIX works fine).

Nessus Server:
CentOS 4.4
Nessus 3.0.3 (RedHat ES4 rpm)
Nessus Direct Feed

Nessus Client:
Fedora Core 6
NessusClient 1.0.2

Policy Info (brief):
Plugins:
Windows Compliance Checks Plugin - enabled
Enable dependencies at runtime - enabled
Silent dependencies - enabled

Crendentials:
SMB account - specified (local admin)
SMB password - specified
SMB domain - specified

Target selection:
Target: Single Windows XP SP2 host

Prefs:
Windows Compliance Checks:
Policy file #1: federal_nsa_microsoft_xp_user_right_assignment.audit
Policy file #2: federal_audit_microsoft_windows_os_guideline.audit

I get the following error in nessusd.dump every time I try to run a scan:

[26363](compliance_check.nbin:0x161a) A non-authenticated script 
attempted to use an authenticated function - returning NULL
[26363](compliance_check.nbin:0x161a) 
script_get_preference_file_location: script is not authenticated!

I've tried both domain and local authenticated accounts (just local 
Admin, not domain).  I get entries in the Security event log for two 
successful login for whatever test account I use plus a couple others 
(administrator and nessus+random number).  When I enable Windows checks 
that check policy requiring a login, they work just fine.

Any ideas on what I'm missing?

Thanks,
Mike
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