Hibernate 3.0.5 works but no the newer version, something has changed??

Hibernate version:3.1

Mapping documents:

hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect
hibernate.transaction.factory_class=org.hibernate.transaction.JDBCTransactionFactory



Full stack trace of any exception that occurs:
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:378)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:110)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1859)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1152)


Name and version of the database you are using:My SQL

i dont think it should create problem.
i think there should be problem in your hibernate.properties file.
u just check the properties and put it bin directory of your application server.
thanks...

my properties file lokks like that:

hibernate.connection.driver_class=com.mysql.jdbc.Driver
hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect
hibernate.transaction.factory_class=org.hibernate.transaction.JDBCTransactionFactory


and it works with hibernate3.0.5