I am again gettting this problem.
i am working on eclipse IDE.
plz help me on this Error:

ava.lang.NoClassDefFoundError: javax/transaction/Synchronization
    org.hibernate.impl.SessionImpl.<init>(SessionImpl. java:212)
    org.hibernate.impl.SessionFactoryImpl.openSession( SessionFactoryImpl.java:437)
    org.hibernate.impl.SessionFactoryImpl.openSession( SessionFactoryImpl.java:461)
    org.hibernate.impl.SessionFactoryImpl.openSession( SessionFactoryImpl.java:469)
    com.outworx.dashboard.businessobject.StatusEntity. saveStatus(StatusEntity.java:59)
    com.outworx.dashboard.struts.action.Dsr.DsrAction. execute(DsrAction.java:132)
    org.apache.struts.action.RequestProcessor.processA ctionPerform(RequestProcessor.java:484)
    org.apache.struts.action.RequestProcessor.process( RequestProcessor.java:274)
    org.apache.struts.action.ActionServlet.process(Act ionServlet.java:1482)
    org.apache.struts.action.ActionServlet.doPost(Acti onServlet.java:525)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
    javax.servlet.http.HttpServlet.service(HttpServlet .java:810)