6 ．添加 < SafeControls > ，这里同样配置版本升级
      < SafeControl Assembly = "System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" Namespace="System.Web.UI" TypeName="*" Safe="True" />
7 ．最后，在 < configuration > 标记内的底部（仅在 configuration > 之前），添加如下配置信息，对组件版本作了升级
  < system.web.extensions >
    < scripting >
      < webServices >
      webServices >
    scripting >
  system.web.extensions >
  < system.webServer >
    < validation validateIntegratedModeConfiguration = "false"/>
    < modules >
      < add name = "ScriptModule" preCondition="integratedMode" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
    modules >
    < handlers >
      < remove name = "WebServiceHandlerFactory-Integrated" />
      < add name = "ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      < add name = "ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
      < add name = "ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
    handlers >
  system.webServer >
  < system.webServer >
    < validation validateIntegratedModeConfiguration = "false"/>
    < modules >
      < remove name = "ScriptModule" />
      < add name = "ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    modules >
    < handlers >
      < remove name = "WebServiceHandlerFactory-Integrated"/>
      < remove name = "ScriptHandlerFactory" />
      < remove name = "ScriptHandlerFactoryAppServices" />
      < remove name = "ScriptResource" />
      < add name = "ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      < add name = "ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
      < add name = "ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    handlers >
  system.webServer >
8 ．最后如果以前开发的 AJAX 部件绑定还是 1.0.61025.0 版本可以添加如下配置信息来做版本兼容。
  < runtime >
    < assemblyBinding xmlns = "urn:schemas-microsoft-com:asm.v1">
      < dependentAssembly >
        < assemblyIdentity name = "System.Web.Extensions" publicKeyToken="31bf3856ad364e35" culture="neutral" />
        < bindingRedirect oldVersion = "1.0.61025.0" newVersion="3.5.0.0" />
      dependentAssembly >
    assemblyBinding >
  runtime >
 
完成。
配制后刷新 MOSS 网站首页，错误排除。
 
参考文章：
http://www.telerik.com/help/aspnet-ajax/moss-install-aspnet-ajax-35.html