Exception "javax.security.sasl.SaslException: Authentication failed: all available authentication mechanisms failed" is printed out although EJB remote client connects successful

Jun 4, 2012 4:58:49 PM org.jboss.ejb.client.remoting.VersionReceiver handleMessage
INFO: EJBCLIENT000017: Received server version 1 and marshalling strategies [river]
Jun 4, 2012 4:58:49 PM org.jboss.ejb.client.remoting.RemotingConnectionEJBReceiver associate
INFO: EJBCLIENT000013: Successful version handshake completed for receiver context EJBReceiverContext{clientContext=org.jboss.ejb.client.EJBClientContext@b03be0, receiver=Remoting connection EJB receiver [connection=Remoting connection <e64686>,channel=jboss.ejb,nodename=1011server3]} on channel Channel ID d30e5113 (outbound) of Remoting connection 016d2633 to /192.168.56.101:4447
Jun 4, 2012 4:58:49 PM org.jboss.remoting3.remote.RemoteConnection handleException
ERROR: JBREM000200: Remote connection failed: javax.security.sasl.SaslException: Authentication failed: all available authentication mechanisms failed
Jun 4, 2012 4:58:49 PM org.jboss.ejb.client.remoting.RemotingConnectionClusterNodeManager getEJBReceiver
INFO: Could not create a connection for cluster node ClusterNode{clusterName='ejb', nodeName='1011server3', clientMappings=[ClientMapping{sourceNetworkAddress=/0:0:0:0:0:0:0:0, sourceNetworkMaskBits=0, destinationAddress='192.168.56.101', destinationPort=4447}], resolvedDestination=[Destination address=192.168.56.101, destination port=4447]} in cluster ejb
java.lang.RuntimeException: javax.security.sasl.SaslException: Authentication failed: all available authentication mechanisms failed
	at org.jboss.ejb.client.remoting.IoFutureHelper.get(IoFutureHelper.java:91)
	at org.jboss.ejb.client.remoting.RemotingConnectionClusterNodeManager.getEJBReceiver(RemotingConnectionClusterNodeManager.java:104)
	at org.jboss.ejb.client.ClusterContext$EJBReceiverAssociationTask.call(ClusterContext.java:406)
	at org.jboss.ejb.client.ClusterContext$EJBReceiverAssociationTask.call(ClusterContext.java:380)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
	at java.util.concurrent.FutureTask.run(FutureTask.java:166)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
	at java.lang.Thread.run(Thread.java:679)
Caused by: javax.security.sasl.SaslException: Authentication failed: all available authentication mechanisms failed
	at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:315)
	at org.jboss.remoting3.remote.ClientConnectionOpenListener$Capabilities.handleEvent(ClientConnectionOpenListener.java:214)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:72)
	at org.xnio.channels.TranslatingSuspendableChannel.handleReadable(TranslatingSuspendableChannel.java:189)
	at org.xnio.channels.TranslatingSuspendableChannel$1.handleEvent(TranslatingSuspendableChannel.java:103)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:72)
	at org.xnio.nio.NioHandle.run(NioHandle.java:90)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:184)
	at ...asynchronous invocation...(Unknown Source)
	at org.jboss.remoting3.EndpointImpl.doConnect(EndpointImpl.java:270)
	at org.jboss.remoting3.EndpointImpl.connect(EndpointImpl.java:386)
	at org.jboss.ejb.client.remoting.NetworkUtil.connect(NetworkUtil.java:151)
	at org.jboss.ejb.client.remoting.NetworkUtil.connect(NetworkUtil.java:132)
	at org.jboss.ejb.client.remoting.RemotingConnectionClusterNodeManager.getEJBReceiver(RemotingConnectionClusterNodeManager.java:101)
	... 7 more