httpclient 遇到 NTLM 认证问题.

Feb 19, 2013 5:17:52 PM org.apache.commons.httpclient.auth.AuthChallengeProcessor selectAuthScheme
INFO: ntlm authentication scheme selected
Feb 19, 2013 5:17:52 PM org.apache.commons.httpclient.HttpMethodDirector processProxyAuthChallenge
INFO: No credentials available for NTLM <any realm>@proxy.adcchina.corpintra.net:3128
Feb 19, 2013 5:17:52 PM org.apache.commons.httpclient.HttpMethodDirector authenticateProxy
WARNING: Required proxy credentials not available for NTLM <any realm>@proxy.adcchina.corpintra.net:3128
Feb 19, 2013 5:17:52 PM org.apache.commons.httpclient.HttpMethodDirector processProxyAuthChallenge
INFO: Failure authenticating with NTLM <any realm>@proxy.adcchina.corpintra.net:3128

一直出这个警告.
     而且 NTLM 认证之后 不需要  装载到 HttpClient 中么?  怎么个情况?
有做过 这方面的么.求指导! NTLM  HttpClient  

补充：Java ,  Java EE