Castle activerecord 出错问题在线等好心人解决,弄了一两天,老是抱这个错误????晕倒``````````

说明: 在处理向该请求提供服务所需的配置文件时出错。请检查下面的特定错误详细信息并适当地修改配置文件。 分析器错误信息: 创建 activerecord 的配置节处理程序时出错: 调用的目标发生了异常。源错误: 
行 2:  <configuration>
行 3:    <configSections>
行 4:      <section name="activerecord" type="Castle.ActiveRecord.Framework.Config.ActiveRecordSectionHandler, Castle.ActiveRecord"/>
行 5:    </configSections>
行 6:    <appSettings>程序集加载跟踪: 下列信息有助于确定程序集“Castle.Core, Version=1.0.3.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc”无法加载的原因。我用的activerecord.dll 是1.0.3.4333web.config 文件是这样配置的<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="activerecord" type="Castle.ActiveRecord.Framework.Config.ActiveRecordSectionHandler, Castle.ActiveRecord"/>
  </configSections>
  <appSettings>
    <add key="ConnString" value="server=.;database=OA_DB;uid=sa;pwd=sa"/>
  </appSettings>
  <activerecord>
    <config>
      <add key="hibernate.connection.driver_class" value="NHibernate.Driver.SqlClientDriver"/>
      <add key="hibernate.dialect" value="NHibernate.Dialect.MsSql2000Dialect"/>
      <add key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider"/>
      <add key="hibernate.connection.connection_string" value="server=.;database=OA_DB;uid=sa;pwd=sa"/>
    </config>
  </activerecord>
  <system.web>
    <compilation debug="true">
      <assemblies>
        <add assembly="System.Transactions, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
      </assemblies>
    </compilation>
  </system.web>
</configuration>