更新ASP.NET 3.5到4.0 - ＆GT; Sys.WebForms.PageRequestManager未定义

正如标题所示，我最近更新包含的UpdatePanel和类似的AJAX技术，ASP.NET 4.0的ASP.NET 3.5应用程序。不幸的是，的UpdatePanel工作，没有更多的和完整的网页回发使得这一切向南走。

As the title indicates, I recently updated an ASP.NET 3.5 application containing UpdatePanels and similar AJAX technologies to ASP.NET 4.0. Unfortunately, the UpdatePanels work no more and full page postbacks makes it all go south.

的Web.config文件

Web.config-file

 <?xml version="1.0"?>
 <configuration>
    <configSections>
        <section name="exceptionHandling" type="Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Configuration.ExceptionHandlingSettings, Microsoft.Practices.EnterpriseLibrary.ExceptionHandling"/>
        <section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging"/>
        <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data"/>
    </configSections>
    <system.net>
        <mailSettings>
            <smtp>
                <network host="localhost"/>
            </smtp>
        </mailSettings>
    </system.net>
    <system.web>
        <!--
             The <authentication> section enables configuration 
             of the security authentication mode used by 
             ASP.NET to identify an incoming user. 
         -->
        <authentication mode="Forms">
            <forms loginUrl="~/Login.aspx" name=".ASPXFORMSAUTH" defaultUrl="~/Administration/SystemEvents.aspx"/>
        </authentication>
        <!--
             The <customErrors> section enables configuration 
             of what to do if/when an unhandled error occurs 
             during the execution of a request. Specifically, 
             it enables developers to configure html error pages 
             to be displayed in place of a error stack trace. -->
        <customErrors mode="RemoteOnly" defaultRedirect="~/Error.aspx">
            <error statusCode="401" redirect="~/Unauthorized.aspx"/>
        </customErrors>
        <pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>
    <system.webServer>
        <validation validateIntegratedModeConfiguration="false"/>
    </system.webServer>
 </configuration>

JavaScript错误在执行中铬：

Javascript error upon execution in Chrome:

Uncaught TypeError: Object function Function() { [native code] } has no method '_registerScript'
Uncaught TypeError: Cannot read property 'PageRequestManager' of undefined

有什么我可以做了不少错事？谢谢！

What is there that I could've done wrong? Thank you!