Sys is not defined,ASP.NET Ajax client-side framework failed to load.

[Abhi Shinde]

Hello,
I am using telerik controls in my web-application (asp.net, C#).
When I upload published files on server I am getting foll. errors in browser and telerik controls are not working.
Mozilla-
1.  ASP.NET Ajax client-side framework failed to load.
2.  Sys is not defined

Chrome-
1.  Uncaught SyntaxError: Unexpected token < 
2.  Uncaught Error: ASP.NET Ajax client-side framework failed to load.  
3.  Uncaught ReferenceError: Sys is not defined  

Please see attached images for more details.

I have referred foll. site but still its not resolved.
http://www.telerik.com/help/aspnet-ajax/introduction-troubleshooting.html 

Telerik DLL version - 2010.3.1215.35
AjaxControlToolkit.dll  version - 3.0.20820.0
My web.config file -

<?xml version="1.0"?>
<configuration>
  <configSections>
    <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
      <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
        <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
          <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>
          <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
          <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
          <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
        </sectionGroup>
      </sectionGroup>
    </sectionGroup>
  </configSections>

  <appSettings>
  </appSettings>
  <connectionStrings>
  </connectionStrings>
  <system.web>
    <!--
            Set compilation debug="true" to insert debugging
            symbols into the compiled page. Because this
            affects performance, set this value to true only
            during development.
        -->
    <httpRuntime maxRequestLength="51200" executionTimeout="3600" />
      <compilation debug="true">
          <assemblies>
              <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
              <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
              <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
              <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

              <add assembly="System.Runtime.Serialization, Version=3.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
              <add assembly="System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
              <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
              <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
              <add assembly="System.Speech, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
              <add assembly="System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          </assemblies>
      </compilation>
    <!--
            The <authentication> section enables configuration
            of the security authentication mode used by
            ASP.NET to identify an incoming user.
        -->
      <machineKey validationKey="F9D1A2D3E1D3E2F7B3D9F90FF3965ABDAC304902" decryptionKey="F9D1A2D3E1D3E2F7B3D9F90FF3965ABDAC304902F8D923AC" validation="SHA1"></machineKey>
    <authentication mode="Forms">
      <forms name=".SSOAuth" loginUrl="login.aspx" defaultUrl="Redirect.aspx" protection="Validation" timeout="30000"/>
    </authentication>

    <customErrors mode="Off"/>
    <membership defaultProvider="MysueMembershipProvider">
      <providers>
        <clear/>
        <add name="MyMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="My_testConnectionString"  minRequiredPasswordLength="3" minRequiredNonalphanumericCharacters="0" requiresQuestionAndAnswer="false" requiresUniqueEmail="false"  passwordFormat="Clear" applicationName="Mysue" maxInvalidPasswordAttempts="2147483647"/>
      </providers>
    </membership>
    <anonymousIdentification enabled="true"/>
    <profile defaultProvider="MysueProfileProvider" enabled="true">
      <providers>
        <clear/>
        <add name="MyProfileProvider" connectionStringName="My_testConnectionString" applicationName="Mysue" type="System.Web.Profile.SqlProfileProvider"/>
      </providers>
      <properties>
        <add name="UserName" type="String"/>
        <add name="UserRole" type="String"/>
        <add name="UserId" type="long"/>
        <add name="UserEmail" type="String"/>
      </properties>
    </profile>

    <roleManager enabled="true" cacheRolesInCookie="true" defaultProvider="MysueRoleProvider" cookieName=".ASPXROLES" cookiePath="/" cookieTimeout="30" cookieRequireSSL="false" cookieSlidingExpiration="true" createPersistentCookie="false" cookieProtection="All">
      <providers>
        <clear/>
        <add name="MyRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="Mysue_testConnectionString" applicationName="MyTest"/>
      </providers>
    </roleManager>
      <healthMonitoring enabled="true">
          <eventMappings>
              <clear/>
              <!-- Log ALL error events -->
              <add name="All Errors" type="System.Web.Management.WebBaseErrorEvent" startEventCode="0" endEventCode="2147483647"/>
          </eventMappings>
          <providers>
              <clear/>
              <!-- Provide any customized SqlWebEventProvider information here (such as a different connection string name value -->
              <add connectionStringName="My_testConnectionString" maxEventDetailsLength="1073741823" buffer="false" name="SqlWebEventProvider" type="System.Web.Management.SqlWebEventProvider"/>
          </providers>
          <rules>
              <clear/>
              <add name="All Errors Default" eventName="All Errors" provider="SqlWebEventProvider" profile="Default" minInstances="1" maxLimit="Infinite" minInterval="00:00:00"/>
          </rules>
      </healthMonitoring>
    <!--
            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="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
      <pages>
          <controls>
              <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI"/>
              <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
              <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
              <add tagPrefix="asp" namespace="System.Web.UI.DataVisualization.Charting" assembly="System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
              <add tagPrefix="telerik" namespace="Telerik.Charting" assembly="Telerik.Web.UI"/>
          </controls>
      </pages>
      <httpHandlers>
          <remove verb="*" path="*.asmx"/>
          <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
          <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
          <add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Version=2010.3.1215.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false"/>
          <add path="ChartImg.axd" verb="GET,HEAD,POST" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
          <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" />

      </httpHandlers>
      <httpModules>
          <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

      </httpModules>
  </system.web>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
        <providerOption name="CompilerVersion" value="v3.5"/>
        <providerOption name="WarnAsError" value="false"/>
      </compiler>
    </compilers>
  </system.codedom>
  <!--
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
    -->
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false"/>
    <modules>

      <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="ChartImage_axd" />
          <remove name="WebServiceHandlerFactory-Integrated" />
          <remove name="ScriptHandlerFactory" />
          <remove name="ScriptHandlerFactoryAppServices" />
          <remove name="ScriptResource" />
          <remove name="Telerik_Web_UI_WebResource_axd" />
          <remove name="ChartImageHandler" />
          <add name="ChartImage_axd" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" preCondition="integratedMode,runtimeVersionv2.0" />
          <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" />
          <add name="ChartImageHandler" preCondition="integratedMode" verb="GET,HEAD" path="ChartImg.axd" type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
          <add name="ChartImg" verb="*" path="ChartImg.axd"  type="System.Web.UI.DataVisualization.Charting.ChartHttpHandler, System.Web.DataVisualization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"  />
          <add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResourceSession" />
      </handlers>
      <rewrite>
          <rules>
              <rule name="RewriteASPX">
                  <match url="(.*)" />
                  <conditions logicalGrouping="MatchAll">
                      <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                      <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                  </conditions>
                  <action type="Rewrite" url="login.aspx?id={R:0}" />
              </rule>
          </rules>
      </rewrite>
  </system.webServer>
  <location path="Admin">
    <system.web>
      <authorization>
        <allow roles="Admin"/>
        <deny users="*"/>
      </authorization>
    </system.web>
  </location>
  <location path="Member">
    <system.web>
      <authorization>
        <allow roles="Member"/>
        <deny users="*"/>
      </authorization>
    </system.web>
  </location>
    <location path="Telerik.Web.UI.WebResource.axd">
        <system.web>
            <authorization>
                <allow users="*"/>
            </authorization>
        </system.web>
    </location>
    <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
    <system.web.extensions>
        <scripting>
            <webServices>

            </webServices>

        </scripting>
    </system.web.extensions>
</configuration>

Telerik DLL version - 2010.3.1215.35
AjaxControlToolkit.dll  version - 3.0.20820.0 

Please see attached images.

Please let me know if there is any error in config file.
Thanks

[Mohamed]

I have the same problem here and I need to fix it as soon as possible 
So there is no fix for this?? I've tried every single solution but nothing works till now
Thanks 
MD

[Vasil]

Hello MD,

See these help topics:
http://www.telerik.com/help/aspnet-ajax/introduction-troubleshooting.html
http://www.telerik.com/help/aspnet-ajax/introduction-troubleshooting-production-server.html
http://www.telerik.com/help/aspnet-ajax/introduction-registering-the-httphandlers-on-windows-vista-iis-7-integrated-mode.html

Also try to use asp:ScriptManager or telerik:RadScriptManager instead of the toolkit's one to see if the problem will persist.

Kind regards,
Vasil
the Telerik team