报错信息如下，不知道是为什么？跟老师请教下。
我用的是myeclipse5.5.1 sqlserver2000。已经用上你们最新的jar包了。

2016-12-21 16:47:30 org.springframework.web.servlet.FrameworkServlet initServletBean

严重: Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/config/dao-config.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.component.PojoComponentTuplizer]

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1420)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:563)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)

at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:442)

at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:458)

at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:339)

at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:306)

at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127)

at javax.servlet.GenericServlet.init(GenericServlet.java:212)

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)

at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:966)

at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3956)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4230)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544)

at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)

at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:736)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)

at org.apache.catalina.core.StandardService.start(StandardService.java:448)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:700)

at org.apache.catalina.startup.Catalina.start(Catalina.java:552)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433)