android – 如何从Smack 4.1创建一个帐户

XMPPTCPConnectionConfiguration conf= XMPPTCPConnectionConfiguration.builder()
                                .setservicename("jabber.at")
                                .build();
XMPPTCPConnection connection = new XMPPTCPConnection(conf);

connection.addConnectionListener(xmppConnectionListener);
connection.connect();

AccountManager accountManager = AccountManager.geTinstance(connection);
Map<String,String> map = new HashMap<String,String>();
map.put("username",usr);
map.put("password",pwd);
map.put("email",email);
accountManager.createAccount(usr,pwd,map);

我收到一个错误：

W/System.err﹕ org.jivesoftware.smack.packet.XMPPError@2beba168
W/System.err﹕ at org.jivesoftware.smack.PacketCollector.nextResultOrThrow(PacketCollector.java:217)
W/System.err﹕ at org.jivesoftware.smack.PacketCollector.nextResultOrThrow(PacketCollector.java:198)

我曾尝试使用和不使用Map,同样的错误.
根据jabber.at的Mathias Ertl的说法,可以远程创建帐户,所以我在某处做错了.任何的想法 ？