Error with ASP.NET 3.5 application deployment

I am getting this error while deploying a ASP.NET 3.5 applcation on a web server. the target server is Windows 2008R2 with .NET framework 4.0 installed. Line 5 is开发者_StackOverflow the one that throws an error. I have included all the DLLS that are used in the application.

Please let me know how to fix this issue, without having to upgrade the application to .NET framework 4 appl.

4:  <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
5:      <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
6:      <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

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Check, is the .NET Framework 3.5 is installed. I'm sure that it is not.
So install it, as you are referensing the 3.5 types in your web.config, and they can reference other libraries which are not presented on your server.
If this is not an option, change the line to reference the 4.0 class.

Also check the runtime version for your application pool for this application in the IIS on your server.