مشکل در استفاده از کلاس دیتابیس و tables

[T.Master]

با سلام. من تو نت بینس وقتی table هامو به پایگاه داده bind می کنم این ارور رو میگیرم. کسی می دونی چطور باید حلش کنم؟؟

Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: No Persistence provider for EntityManager named filingdbPU: Provider named oracle.toplink.essentials.PersistenceProvider threw unexpected exception at create EntityManagerFactory:
oracle.toplink.essentials.exceptions.PersistenceUn itLoadingException
Local Exception Stack:
Exception [TOPLINK-30005] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUn itLoadingException
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: sun.misc.Launcher$AppClassLoader@1a46e30
Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManager SetupException
Exception Description: predeploy for PersistenceUnit [filingdbPU] failed.
Internal Exception: Exception [TOPLINK-30007] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.PersistenceUn itLoadingException
Exception Description: An exception was thrown while loading class: filing.DB_Connect to check whether it implements @Entity, @Embeddable, or @MappedSuperclass.
Internal Exception: java.lang.ClassNotFoundException: filing.DB_Connect
at oracle.toplink.essentials.exceptions.PersistenceUn itLoadingException.exceptionSearchingForPersistenc eResources(PersistenceUnitLoadingException.java:14 3)
at oracle.toplink.essentials.ejb.cmp3.EntityManagerFa ctoryProvider.createEntityManagerFactory(EntityMan agerFactoryProvider.java:169)
at javax.persistence.Persistence.createEntityManagerF actory(Persistence.java:110)
at javax.persistence.Persistence.createEntityManagerF actory(Persistence.java:83)



پاگاه دادم هم mysql هستش.
با تشکر