hi, just recently, i've got a need to access an NTLM-protected web page programatically using LWP and i'm getting the same error as yours: 
HTTP/1.1 401 Unauthorized
Date: Tue, 07 Feb 2012 02:49:17 GMT
Server: Microsoft-IIS/6.0
WWW-Authenticate: Negotiate
WWW-Authenticate: NTLM
WWW-Authenticate: Digest qop="auth",algorithm=MD5-sess,nonce="9bee3c16
+43e5cc01cdd097f1c38245318e8bcc42694833d14128d3c67ab436a651383633536b5
+56d",charset=utf-8,realm="Digest"
Content-Length: 83
Content-Type: text/html
Client-Date: Tue, 07 Feb 2012 02:49:19 GMT
Client-Peer: 192.168.1.1:80
Client-Response-Num: 7
Client-Warning: Credentials for 'xxpmuser' failed before
Title: Error
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have you had any luck resolving this? TIA, -ron

In reply to Re^5: How to select NTLM authentication with LWP by riverron
in thread How to select NTLM authentication with LWP by tiedwu

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