ERROR [ExternalService] Error sending message (mex={PartnerRoleMex#hqejbhcnphr7

Deployment of artifact InvokeAddServiceProj successful: [{http://MyTest.com/Test}Caller-15] 
运用BPEL部署流程服务成功 
但在test with explorer时出现这个错误： 
org.apache.axis2.AxisFault: Transport error: 404 Error: Not Found 
at org.apache.axis2.transport.http.HTTPSender.handleResponse(HTTPSender.java:298) 
at org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:192) 
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:77) 
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:327)
at org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:206)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:396) 
at org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:374) 
at org.apache.axis2.description.OutInAxisOperationClient.executeImpl(OutInAxisOperation.java:211) 
at org.apache.axis2.client.OperationClient.execute(OperationClient.java:163) 
at org.apache.ode.axis2.SoapExternalService$1$1.call(SoapExternalService.java:206) 
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) 
at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885) 
at