我在netbeans运行news项目，数据库是mysql，服务器是tomcat5.5

错的地方： 
 public void run() {
if (target != null) {
    target.run();
}
    }
后台报错：
2011-5-30 16:49:35 org.apache.catalina.startup.HostConfig deployDescriptor
严重: Error deploying configuration descriptor admin.xml
org.xml.sax.SAXParseException: XML document structures must start and end within the same entity.
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1231)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
        at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1545)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:565)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:535)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:470)
        at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1190)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:292)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
        at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1305)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578)
        at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558)
        at java.lang.Thread.run(Thread.java:619)
小弟第一次发帖，可能说不清楚，有事请留言