Webservice call fails : java.lang.reflect.InvocationTargetException

My application is deployed in the WAS 5.1, has a webservice jar file InSightService-client.jar which has a package com.aigaa.pmw.insightservice.InSightServiceStub. My application was trying to call webservice which is deployed in tomcat 6.0, while initializing the InSightServiceStub, it throws this following exception. Could you please tell me what is the cause for this exception and how to fix it.


[2/18/09 13:52:49:155 EST] 611f9597 DispatchActio E org.apache.struts.actions.DispatchAction  Dispatch[/Dashboard] to method 'createResultset' returned an exception
[2/18/09 13:52:49:186 EST] 611f9597 DispatchActio E org.apache.struts.actions.DispatchAction  TRAS0014I: The following exception was logged java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
      at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
      at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
      at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
      at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
      at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
      at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
      at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
      at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
      at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
      at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
      at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
      at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
      at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
      at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:1019)
      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:592)
      at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:204)
      at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:125)
      at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:286)
      at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
      at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:116)
      at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:186)
      at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
      at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
      at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java(Compiled Code))
      at com.ibm.ws.http.HttpConnection.run(HttpConnection.java(Compiled Code))
      at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))
Caused by: java.lang.NoSuchMethodError: javax.xml.namespace.QName: method <init>(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V not found
      at org.apache.axis2.engine.DispatchPhase.<clinit>(DispatchPhase.java:300)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java(Compiled Code))
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java(Compiled Code))
      at java.lang.reflect.Constructor.newInstance(Constructor.java(Compiled Code))
      at java.lang.Class.newInstance3(Class.java(Compiled Code))
      at java.lang.Class.newInstance(Class.java(Compiled Code))
      at org.apache.axis2.deployment.AxisConfigBuilder.getPhase(AxisConfigBuilder.java:749)
      at org.apache.axis2.deployment.AxisConfigBuilder.processPhaseList(AxisConfigBuilder.java:497)
      at org.apache.axis2.deployment.AxisConfigBuilder.processPhaseOrders(AxisConfigBuilder.java:544)
      at org.apache.axis2.deployment.AxisConfigBuilder.populateConfig(AxisConfigBuilder.java:145)
      at org.apache.axis2.deployment.DeploymentEngine.populateAxisConfiguration(DeploymentEngine.java:641)
      at org.apache.axis2.deployment.FileSystemConfigurator.getAxisConfiguration(FileSystemConfigurator.java:116)
      at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContext(ConfigurationContextFactory.java:68)
      at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContextFromFileSystem(ConfigurationContextFactory.java:184)
      at org.apache.axis2.client.ServiceClient.configureServiceClient(ServiceClient.java:150)
      at org.apache.axis2.client.ServiceClient.<init>(ServiceClient.java:143)
      at com.aigaa.pmw.insightservice.InSightServiceStub.<init>(InSightServiceStub.java:151)
      at com.aigaa.pmw.insightservice.InSightServiceStub.<init>(InSightServiceStub.java:137)
      at com.aigaa.pmw.insightservice.InSightServiceStub.<init>(InSightServiceStub.java:185)
      at com.aigaa.pmw.DashboardAction.createResultset(DashboardAction.java:3311)
      ... 33 more