连接未打开

我有一个web应用程序，使用Fluent NHibernate作为ORM, ORACLE 11g作为数据库。

下面是我的配置生成器，看起来像

return Fluently.Configure()
                .Database(OracleDataClientConfiguration.Oracle10
                                .ConnectionString(c => c.FromConnectionStringWithKey("ora"))
                                .AdoNetBatchSize(100)
                                .Driver<NHibernate.Driver.OracleClientDriver>()
                         )
                .Mappings(mappings => mappings.FluentMappings.AddFromAssemblyOf<UserMapping>())
                //.ExposeConfiguration(ReCreateSchema)
                .BuildConfiguration();

下面是我的连接字符串

<connectionStrings>
    <add name="ora" connectionString="Server=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=host)(PORT=1521))(CONNECT_DATA=(SERVER = DEDICATED)(SERVICE_NAME=serviceName)));User Id=uidxx;Password=pwdxx;" />
  </connectionStrings>

从配置开始，下一步是构建会话工厂

ISessionFactory sesionFactory = config.BuildSessionFactory();

每当我运行应用程序时，它都会抛出代码为

的错误。

ORA-06413: Connection not Open

是否有我遗漏的配置?我也试图研究解决方案，但一无所获。我也尝试用OracleClientConfiguration.Oracle10替换配置，但我得到了相同的结果。

谢谢!

return Fluently.Configure()
                .Database(OracleManagedDataClientConfiguration.Oracle10
                                .ConnectionString(c => c.FromConnectionStringWithKey("ora"))
                                .AdoNetBatchSize(100)
                                .Driver<NHibernate.Driver.OracleManagedDataClientDriver>()
                         )
                .Mappings(mappings => mappings.FluentMappings.AddFromAssemblyOf<UserMapping>())
                //.ExposeConfiguration(ReCreateSchema)
                .BuildConfiguration();