急！一个困扰了很久的问题

最近做j2ee开发，可是在start tomcat的时候老碰到下面的问题，请高手们帮忙看看：

08-28 18:24:19.562 ERROR [ContextLoader.java:205] Context initialization failed
org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class that [org.springframework.orm.hibernate3.HibernateTransactionManager] of bean with name 'transactionManager' defined in class path resource [dataAccessContext.xml]: dependency not found; nested exception is java.lang.NoClassDefFoundError: javax/transaction/Synchronization
Caused by:
java.lang.NoClassDefFoundError: javax/transaction/Synchronization
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2365)
at java.lang.Class.getMethod0(Class.java:2611)
at java.lang.Class.getMethod(Class.java:1579)
at org.springframework.orm.hibernate3.HibernateTransactionManager.<clinit>(HibernateTransactionManager.java:139)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at org.springframework.util.ClassUtils.forName(ClassUtils.java:160)
at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:308)
at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:853)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:176)
at org.springframework.context.support.AbstractApplicationContext.getBeanNamesForType(AbstractApplicationContext.java:686)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:397)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:330)
at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:156)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3729)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4187)
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 org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:904)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:867)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:709)
at org.apache.catalina.startup.Catalina.start(Catalina.java:551)
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.catalina.startup.Bootstrap.start(Bootstrap.java:294)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432)
。。。。。。
严重: Error listenerStart
2006-8-28 18:24:19 org.apache.catalina.core.StandardContext start
严重: Context [/DsServer] startup failed due to previous errors

添加了jta.jar包后还是显示此问题

已解决

只能顶了

什么问题，怎么解决的，希望说说，也让别人少走弯路。