ASP.NET AJAX Sys.webserver settings ?? for .NET 4.5 and IIS7

I am calling pageMethod in codebehind of aspx page. I get the response for whole page instead of webMethod response. Also, I tried calling the same webMethod using jquery

and got the whole page as response.

Client:<asp:ScriptManager ID="scriptManager1" runat="server" EnablePartialRendering="True"
 EnablePageMethods="true" EnableScriptGlobalization="true" EnableScriptLocalization="true" >

function TestNumber() {
PageMethods.getNumber(ResponseTest);
}

 function ResponseTest(response){
          var num = response.d;
      }

CodeBehind:

 [WebMethod]
 public static int getNumber()
        {
            return accountNumber;
        }

I am using .NET 4.5.1 and IIS7.5 and I think the issue is realted to in built extensionless URLS in VS2013. I am using the following web.config sys.webserver

<system.webServer><validationvalidateIntegratedModeConfiguration="false"/><modulesrunAllManagedModulesForAllRequests="true"><removename="ScriptModule"/><addname="ScriptModule"preCondition="managedHandler"type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/></modules><handlers><removename="ExtensionlessUrlHandler-Integrated-4.0"/><removename="OPTIONSVerbHandler"/><removename="TRACEVerbHandler"/><addname="ExtensionlessUrlHandler-Integrated-4.0"path="*."verb="*"type="System.Web.Handlers.TransferRequestHandler"preCondition="integratedMode,runtimeVersionv4.0"/></handlers></system.webServer>

I tried the same through Jquery ajax call and got whole page. Am i missing any thing?