Jive Forums remote authentication is not working

ServiceLocator locator = new ServiceLocator("http://localhost:8083/jiveforums", "admin", "admin");
ContentService contentService = locator.getContentService();

Exception in thread "main" com.jivesoftware.base.UnauthorizedException: Authentication Failed
	at com.jivesoftware.forum.webservices.ServiceLocator$ExceptionHandler.getException(ServiceLocator.java:410)
	at com.jivesoftware.forum.webservices.ServiceLocator$ExceptionHandler.invoke(ServiceLocator.java:364)
	at $Proxy0.getForumCategory(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at com.jivesoftware.forum.webservices.ServiceLocator$CacheHandler.invoke(ServiceLocator.java:492)
	at $Proxy1.getForumCategory(Unknown Source)
	at Scrap.main(Scrap.java:21)

11:38:15,479 DEBUG integration.service.soap.xfire.XFireInLoggingMethodHandler: SOAP service method: authenticatePrincipal
	com.atlassian.crowd.integration.authentication.AuthenticatedToken@c202ae[name=jiveforums,token=i1l8nrfeSbGKFnzT1ETbMA00]
	com.atlassian.crowd.integration.authentication.PrincipalAuthenticationContext@3df1ff[name=<null>,credential=com.atlassian.crowd.integration.authentication.PasswordCredential@0,validationFactors={com.atlassian.crowd.integration.authentication.ValidationFactor@dada88[name=User-Agent,value=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; XFire Client +http://xfire.codehaus.org)],com.atlassian.crowd.integration.authentication.ValidationFactor@4140b3[name=remote_address,value=127.0.0.1],<null>},application=jiveforums]

...	

11:38:17,488 DEBUG atlassian.crowd.manager.directory.DirectoryManagerGeneric: authenticate: user null