请教一个nhibernate的问题

我运行nhibernate的NHibernate.Demo.QuickStart
在第一个语句Configuration cfg = new Configuration();这里就抛出异常了如下，请问如何处理，我的项目是使用vs.net做的，已经加入app.config以及User.hbm.xml（设置为嵌入的资源）：
log4net:ERROR LogLog: Exception while reading ConfigurationSettings. Check your .config file is well formed XML.
System.Configuration.ConfigurationException: 加载 XML 文件 c:\winnt\microsoft.net\framework\v1.0.3705\Config\machine.config 请求 System.Security.Permissions.StrongNameIdentityPermission, mscorlib, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 类型的权限已失败。 时出错 (c:\winnt\microsoft.net\framework\v1.0.3705\Config\machine.config)
at System.Configuration.ConfigurationRecord.OpenXmlTextReader(String configFileName)
at System.Configuration.ConfigurationRecord.Load(String filename)
at System.Configuration.DefaultConfigurationSystem.System.Configuration.IConfigurationSystem.Init()
at System.Configuration.ConfigurationSettings.SetConfigurationSystem(IConfigurationSystem configSystem)
at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
at System.Configuration.ConfigurationSettings.get_AppSettings()
at log4net.helpers.LogLog..cctor()
log4net:ERROR DOMConfigurator: Failed to parse config file. Is the <configSections> specified as: <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net, Version=1.2.0.30714, Culture=neutral, PublicKeyToken=b32731d11ce58905" />
System.Configuration.ConfigurationException: 加载 XML 文件 c:\winnt\microsoft.net\framework\v1.0.3705\Config\machine.config 请求 System.Security.Permissions.StrongNameIdentityPermission, mscorlib, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 类型的权限已失败。 时出错 (c:\winnt\microsoft.net\framework\v1.0.3705\Config\machine.config)
at System.Configuration.ConfigurationSettings.GetConfig(String sectionName)
at log4net.Config.DOMConfigurator.Configure(ILoggerRepository repository)
未处理的“System.Configuration.ConfigurationException”类型的异常出现在 system.dll 中

其他信息：加载 XML 文件 c:\winnt\microsoft.net\framework\v1.0.3705\Config\machine.config 请求 System.Security.Permissions.StrongNameIdentityPermission, mscorlib, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 类型的权限已失败。 时出错