JSF部署到JBoss4.0中出错

查看jboss的启动日志如下,怎么会失败呢?
--- MBeans waiting for other MBeans ---
ObjectName: jboss.web.deployment:id=1259200469,war=JSFDemo.war
  State: FAILED
  Reason: org.jboss.deployment.DeploymentException: URL file:/G:/jboss-4.0.3/server/default/deploy/JSFDemo.war/ deployment failed--- MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM ---
ObjectName: jboss.web.deployment:id=1259200469,war=JSFDemo.war
  State: FAILED
  Reason: org.jboss.deployment.DeploymentException: URL file:/G:/jboss-4.0.3/server/default/deploy/JSFDemo.war/ deployment failed