ho fatto delle piccole modifiche nel persistence.xml ed adesso mi lancia questa eccezione:

codice:
 
INFO: Hibernate Validator not found: ignoring
21-giu-2010 14.32.58 org.hibernate.connection.UserSuppliedConnectionProvider configure
AVVERTENZA: No connection properties specified - the user must supply JDBC connections
<21-giu-2010 14.32.58 CEST> <Error> <Deployer> <BEA-149205> <Failed to initialize the application '_appsdir_Machines_ear' due to error weblogic.application.ModuleException: Exception preparing module: EJBModule(Machines-ejb.jar)
.
weblogic.application.ModuleException: Exception preparing module: EJBModule(Machines-ejb.jar)

        at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:467)
        at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
        at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:508)
        at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:41)
        at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:149)
        Truncated. see log file for complete stacktrace

Caused By: org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
        at org.hibernate.dialect.DialectFactory.determineDialect(DialectFactory.java:57)
        at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:39)
        at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:426)
        at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:128)
        at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
        Truncated. see log file for complete stacktrace
>
anche se devo dire che mi vede i miei entity ad esempio:

codice:
 
21-giu-2010 14.32.57 org.hibernate.cfg.annotations.QueryBinder bindQuery
INFO: Binding Named query: Dbusers.findById => SELECT d FROM Dbusers d WHERE d.id = :id

dove sbaglio?
avete qualche idea o suggerimento da darmi?