[xwiki-users] ldap auth against active directory fails

hallo i am currently trying to setup xwiki on taomcat 5.5/mysql. until now its doing quite well :) my next step is to get ldap authentication against an active directory working. i followed http://platform.xwiki.org/xwiki/bin/view/AdminGuide/Authentication#HLDAPCon… and some postings on the mailing list but i cant get it to work. i either end up with: com.xpn.xwiki.plugin.ldap.XWikiLDAPException: Error number 0 in 5: LDAP bind failed with LDAPException. Wrapped Exception: Invalid Credentials or worse (with in my eyes the propper config): WARN LDAP.XWikiLDAPAuthS erviceImpl - LDAP authentication failed. java.lang.NullPointerException at com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl.ldapAuthenticate(XWikiLDAPAuthServiceImpl.java:256) at com.xpn.xwiki.user.impl.LDAP.XWikiLDAPAuthServiceImpl.authenticate(XWikiLDAPAuthServiceImpl.java:107) at com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.authenticate(MyFormAuthenticator.java:194) at com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.processLogin(MyFormAuthenticator.java:127) at com.xpn.xwiki.user.impl.xwiki.MyFormAuthenticator.processLogin(MyFormAuthenticator.java:112) at com.xpn.xwiki.user.impl.xwiki.XWikiAuthServiceImpl.checkAuth(XWikiAuthServiceImpl.java:214) at com.xpn.xwiki.XWiki.checkAuth(XWiki.java:3307) at com.xpn.xwiki.user.impl.xwiki.XWikiRightServiceImpl.checkAccess(XWikiRightServiceImpl.java:136) at com.xpn.xwiki.XWiki.checkAccess(XWiki.java:3315) at com.xpn.xwiki.XWiki.prepareDocuments(XWiki.java:4259) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:173) ... i've done ldap auth on several other tools (apache/subversion, bugzilla). there i used two accounts: one allowed to bind to the active directory and do searches and the useraccount itself. in the xwiki config i can only see the user logging in is used to bind to the ldap server? is the documentation current for xwiki 1.3.2.9174? or can someone give me a hint to make this work? thanks a lot regards werner