Can't add a controller in asp.net MVC3 EF code first - asp.net

Question

I have created a new project from template. I used windows phone cloud toolkit template which server side is a regular asp.net mvc3 project with EF 4.1 code first.
My datacontext is called SqlDataContext and has the following constructor:
public SqlDataContext()
: base(ConfigReader.GetConfigValue("SqlSampleDataContextConnectionString"))
{
}
public DbSet<SqlSampleData> SqlSampleData { get; set; }
My connection string defined in web.config as:
<connectionStrings>
<add name="ApplicationServices" connectionString="Data Source=.\SQLEXPRESS;Integrated Security=true;User Instance=true;AttachDBFilename=|DataDirectory|\WPCloudApp26.mdf;Initial Catalog=WPCloudApp26;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />
</connectionStrings>
I have added a new model called Report and now i want to create new controller with the add controller wizard, using my new Report model and the SqlDataContext. when I try to create i get the following error:
Unable to retrieve metadata for 'WPCloudApp1.Web.Models.Report'.
The 'SqlSampleDataContextConnectionString' setting is not available.
Parameter name: key
And it fails to create the new controller.
What am i doing wrong ? My background in this topic very scarce so please try to make it as simple as possible.
My Report class:
namespace WPCloudApp26.Web.Models
{
using System;
using System.ComponentModel.DataAnnotations;
// Summary:
// Sample Entity Framework 4.1 data class for SQL Azure.
// Using EF 4.1 Code-First, the database structure will be created to mirror this class properties.
// For more information, visit the ADO.NET Entity Framework website at http://msdn.microsoft.com/data/aa937723
public class Report
{
[Key]
public int Id { get; set; }
public string UserId { get; set; }
public string Description { get; set; }
public DateTime Date { get; set; }
public bool IsPublic { get; set; }
}
}
Thanks.
Edit:
I have no problem running the application, only adding a new controller.

Answer 1

Try to replace :
<connectionStrings>
<add name="ApplicationServices" connectionString="Data Source=.\SQLEXPRESS;Integrated Security=true;User Instance=true;AttachDBFilename=|DataDirectory|\WPCloudApp26.mdf;Initial Catalog=WPCloudApp26;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />
</connectionStrings>
By:
<connectionStrings>
<add name="SqlDataContext" connectionString="Data Source=.\SQLEXPRESS;Integrated Security=true;User Instance=true;AttachDBFilename=|DataDirectory|\WPCloudApp26.mdf;Initial Catalog=WPCloudApp26;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" />
</connectionStrings>
The context should be the value stored in the web.config