我们正在尝试在wso2 esb中执行一个poc来调用我们启用了ws-security的BE服务。我们在wso2中设置了代理传递，并根据www.soasecurity.org配置了端点。但是，在尝试使用pass thru proxy时，我们一直收到以下错误。请告知我们是否做错了......
ERROR - Axis2Sender Unexpected error during sending message out
rg.apache.axis2.AxisFault: Unsupported SignedSupportingToken : "{http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702}IssuedToken"
at org.apache.rampart.handler.RampartSender.invoke(RampartSender.java:76)
at org.apache.axis2.engine.Phase.invokeHandler(Phase.java:340)
at org.apache.axis2.engine.Phase.invoke(Phase.java:313)
at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:261)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:426)
at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.send(DynamicAxisOperation.java:185)
at org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:167)
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:149)
at org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:481)
at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:57)
at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:342)
at org.apache.synapse.endpoints.AbstractEndpoint.send(AbstractEndpoint.java:329)
at org.apache.synapse.endpoints.AddressEndpoint.send(AddressEndpoint.java:59)
at org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:173)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
at org.apache.synapse.transport.passthru.ServerWorker.processEntityEnclosingRequest(ServerWorker.java:404)
at org.apache.synapse.transport.passthru.ServerWorker.run(ServerWorker.java:184)
at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.apache.rampart.RampartException: Unsupported SignedSupportingToken : "{http://docs.oasis-open.org/ws-sx/ws-securitypolicy/200702}IssuedToken"
at org.apache.rampart.builder.TransportBindingBuilder.build(TransportBindingBuilder.java:103)
at org.apache.rampart.MessageBuilder.build(MessageBuilder.java:140)
at org.apache.rampart.handler.RampartSender.invoke(RampartSender.java:65)
... 20 more