Castle.ActiveRecord 2.1.2 出错了大虾们救救小弟吧

[已关闭问题]

“/”应用程序中的服务器错误。

Could not find the dialect in the configuration

说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.InvalidOperationException: Could not find the dialect in the configuration

源错误:

行 19:             //Castle.ActiveRecord.Framework.IConfigurationSource source = System.Configuration.ConfigurationManager.GetSection("activerecord") as Castle.ActiveRecord.Framework.IConfigurationSource;
行 20:             XmlConfigurationSource source = new XmlConfigurationSource(Server.MapPath("appconfig.xml")); 
行 21:             Castle.ActiveRecord.ActiveRecordStarter.Initialize(typeof(Castle.ActiveRecord.Domain.Users).Assembly, source);
行 22:         }
行 23:

源文件: C:\SwireWork\lyf\Castle\Castle.ActiveRecord.WebUI\Castle.ActiveRecord.WebUI\Global.asax.cs 行: 21

堆栈跟踪:

[InvalidOperationException: Could not find the dialect in the configuration]
   NHibernate.Dialect.Dialect.GetDialect(IDictionary`2 props) +155
   NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc) +94

[MappingException: Could not compile the mapping document: (string)]
   NHibernate.Cfg.Configuration.LogAndThrow(Exception exception) +56
   NHibernate.Cfg.Configuration.AddValidatedDocument(NamedXmlDocument doc) +249
   NHibernate.Cfg.Configuration.ProcessMappingsQueue() +17
   NHibernate.Cfg.Configuration.AddDocumentThroughQueue(NamedXmlDocument document) +24
   NHibernate.Cfg.Configuration.AddXmlReader(XmlReader hbmReader, String name) +26
   NHibernate.Cfg.Configuration.AddXml(String xml, String name) +133
   NHibernate.Cfg.Configuration.AddXmlString(String xml) +11
   Castle.ActiveRecord.ActiveRecordStarter.AddXmlString(Configuration config, String xml, ActiveRecordModel model) +35

[ActiveRecordException: Error adding information from class Castle.ActiveRecord.Domain.Users to NHibernate. Check the inner exception for more information]
   Castle.ActiveRecord.ActiveRecordStarter.AddXmlString(Configuration config, String xml, ActiveRecordModel model) +144
   Castle.ActiveRecord.ActiveRecordStarter.AddXmlToNHibernateCfg(ISessionFactoryHolder holder, ActiveRecordModelCollection models) +328
   Castle.ActiveRecord.ActiveRecordStarter.RegisterTypes(ISessionFactoryHolder holder, IConfigurationSource source, IEnumerable`1 types, Boolean ignoreProblematicTypes) +197
   Castle.ActiveRecord.ActiveRecordStarter.Initialize(IConfigurationSource source, Type[] types) +376
   Castle.ActiveRecord.ActiveRecordStarter.Initialize(Assembly[] assemblies, IConfigurationSource source, Type[] additionalTypes) +80
   Castle.ActiveRecord.ActiveRecordStarter.Initialize(Assembly assembly, IConfigurationSource source) +56
   Castle.ActiveRecord.WebUI.Global.Application_Start(Object sender, EventArgs e) in C:\SwireWork\lyf\Castle\Castle.ActiveRecord.WebUI\Castle.ActiveRecord.WebUI\Global.asax.cs:21