MVC Entity Framework Connection with SQL server R2 2008

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C#

C#4.0

This is my web.config.It dose not work


<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=152368
-->
<configuration>
<configsections>

<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<appsettings>
<add key="ClientValidationEnabled" value="true">
<add key="UnobtrusiveJavaScriptEnabled" value="true">

<system.web>
<trace enabled="true" pageoutput="false"> <compilation debug="true" targetframework="4.0">
<assemblies>
<add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
<add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">


<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />

<pages>
<namespaces>
<add namespace="System.Web.Helpers">
<add namespace="System.Web.Mvc">
<add namespace="System.Web.Mvc.Ajax">
<add namespace="System.Web.Mvc.Html">
<add namespace="System.Web.Routing">
<add namespace="System.Web.WebPages">



<system.webserver>
<validation validateintegratedmodeconfiguration="false">
<modules runallmanagedmodulesforallrequests="true">

<runtime>
<assemblybinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentassembly>
<assemblyidentity name="System.Web.Mvc" publickeytoken="31bf3856ad364e35">
<bindingredirect oldversion="1.0.0.0-2.0.0.0" newversion="3.0.0.0">




<entityframework>
<defaultconnectionfactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework">
<parameters>
<parameter value="Data Source=.\SQLSERVER2008; Integrated Security=True; MultipleActiveResultSets=True">


<providers>
<provider invariantname="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer">



<connectionstrings>
<add name="EmployeeContext">
connectionString="server=.\SQLSERVER2008; database=Sample; integrated security=SSPI;"
providerName="System.Data.SqlClient"/>




Model Part

public class EmployeeContext :DbContext
{
public DbSet<employee> employees { get; set;}
}

Error Message

An error occurred while getting provider information from the database. This can be caused by Entity Framework using an incorrect connection string. Check the inner exceptions for details and ensure that the connection string is correct.

Please Help me