Error while running the rampart policy sample 05 : Error in retrieving token

Following is the log :

Exception in thread "main" org.apache.axis2.AxisFault: Error in retrieving token :
at org.apache.rampart.handler.RampartSender.invoke(RampartSender.java:76)
at org.apache.axis2.engine.Phase.invokeHandler(Phase.java:335)
at org.apache.axis2.engine.Phase.invoke(Phase.java:308)
at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:262)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:427)
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:406)
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:229)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:165)
at org.apache.axis2.client.ServiceClient.sendReceive(ServiceClient.java:555)
at org.apache.axis2.client.ServiceClient.sendReceive(ServiceClient.java:531)
at org.apache.rampart.samples.policy.sample05.Client.main(Client.java:93)
Caused by: org.apache.rampart.RampartException: Error in retrieving token :
at org.apache.rampart.builder.BindingBuilder.handleSupportingTokens(BindingBuilder.java:379)
at org.apache.rampart.builder.SymmetricBindingBuilder.doSignBeforeEncrypt(SymmetricBindingBuilder.java:487)
at org.apache.rampart.builder.SymmetricBindingBuilder.build(SymmetricBindingBuilder.java:82)
at org.apache.rampart.MessageBuilder.build(MessageBuilder.java:144)
at org.apache.rampart.handler.RampartSender.invoke(RampartSender.java:65)
... 10 more