i have a java application which uses JAX_WS when i deployed on my tomcat5 server . it is deployed successfully. but it fails to start

SEVERE: WSSERVLET11: failed to parse runtime descriptor: 

java.lang.IllegalArgumentException: prefix cannot be "null" when creating a QName
java.lang.IllegalArgumentException: prefix cannot be "null" when creating a QName
   at javax.xml.namespace.QName.<init>(xml-commons-apis-1.3.02.jar.so)
   at gnu.xml.stream.XMLParser.getAttributeName(libgcj.so.7rh)
   at com.sun.xml.ws.util.xml.XMLStreamReaderFilter.getAttributeName(XMLStreamReaderFilter.java:228)
   at com.sun.xml.ws.streaming.XMLStreamReaderUtil$AttributesImpl.<init>(XMLStreamReaderUtil.java:355)
   at com.sun.xml.ws.streaming.XMLStreamReaderUtil.getAttributes(XMLStreamReaderUtil.java:198)
   at com.sun.xml.ws.transport.http.DeploymentDescriptorParser.parseAdapters(DeploymentDescriptorParser.java:204)
   at com.sun.xml.ws.transport.http.DeploymentDescriptorParser.parse(DeploymentDescriptorParser.java:147)
   at com.sun.xml.ws.transport.http.servlet.WSServletContextListener.contextInitialized(WSServletContextListener.java:124)
   at org.apache.catalina.core.StandardContext.listenerStart(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.StandardContext.start(catalina-5.5.23.jar.so)
   at org.apache.catalina.manager.ManagerServlet.start(catalina-manager-5.5.23.jar.so)
   at org.apache.catalina.manager.HTMLManagerServlet.start(catalina-manager-5.5.23.jar.so)
   at org.apache.catalina.manager.HTMLManagerServlet.doGet(catalina-manager-5.5.23.jar.so)
   at javax.servlet.http.HttpServlet.service(tomcat5-servlet-2.4-api-5.5.23.jar.so)
   at javax.servlet.http.HttpServlet.service(tomcat5-servlet-2.4-api-5.5.23.jar.so)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.StandardWrapperValve.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.StandardContextValve.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.authenticator.AuthenticatorBase.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.StandardHostValve.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.valves.ErrorReportValve.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.core.StandardEngineValve.invoke(catalina-5.5.23.jar.so)
   at org.apache.catalina.connector.CoyoteAdapter.service(catalina-5.5.23.jar.so)
   at org.apache.coyote.http11.Http11Processor.process(tomcat-http-5.5.23.jar.so)
   at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(tomcat-http-5.5.23.jar.so)
   at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(tomcat-util-5.5.23.jar.so)
   at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(tomcat-util-5.5.23.jar.so)
   at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(tomcat-util-5.5.23.jar.so)
   at java.lang.Thread.run(libgcj.so.7rh)