Getting XPathFactory exception during start-up

I installed ColdFusion MX 8 Developer Edition on a Windows XP machine by deploying the cfusion.ear onto a JBoss 4.0.3 SP1 server. When the JBoss restarted, here is the partial stack trace. The ColdFusionMessageBrokerServlet was failed to load because it appears http://java.sun.com/jaxp/xpath/dom isn't a valid path?! What do I need to do to work around this problem?

Thanks.


11:32:34,442 INFO [[/cfusion]] failed to load: coldfusion.flex.ColdFusionMessageBrokerServlet
11:32:34,442 ERROR [[/cfusion]] Servlet /cfusion threw load() exception
javax.servlet.UnavailableException: XPathFactory#newInstance() failed to create an XPathFactory for the default object model: http://java.sun.com/jaxp/xpath/dom with the XPathFactoryConfigurationException: javax.xml.xpath.XPathFactoryConfigurationException: No XPathFctory implementation found for the object model: http://java.sun.com/jaxp/xpath/dom
at flex.messaging.MessageBrokerServlet.init(MessageBrokerServlet.java:154)
at coldfusion.flex.ColdFusionMessageBrokerServlet.init(ColdFusionMessageBrokerServlet.java:24)
at coldfusion.bootstrap.ClassloaderHelper.initServletClass(ClassloaderHelper.java:94)
at coldfusion.bootstrap.BootstrapServlet.init(BootstrapServlet.java:59)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1091)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:925)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3857)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4118)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.apache.catalina.core.StandardContext.init(StandardContext.java:5005)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:150)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:280)
at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:88)
at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:357)
at org.jboss.web.WebModule.startModule(WebModule.java:68)
at org.jboss.web.WebModule.startService(WebModule.java:46)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:274)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:230)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:943)
at $Proxy0.start(Unknown Source)