ADO.NET :: MVC 3 Entity Mapping (MapSingleType) Error

I hope I am asking this in the right forum as I need an answer quick. I have a table in my database called PersonalData. In my application I have a model for PersonalData that looks like this:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration;
namespace MyApp.Models
{
public class PersonalData
{
[Key]
public Guid PersonalDateGuid { get; set; }
[Required]
public Guid fkUserGuid { get; set; }
[Required]
public int fkProviderId { get; set; }
[Required]
public int SourceSystem { get; set; }
[Required]
public int DataType { get; set; }
[Required]
public int ModifiedDateTime { get; set; }
public int ValTinyInt { get; set; }
public int ValInt { get; set; }
public float ValDec { get; set; }
public string ValStr { get; set; }
public int Sync { get; set; }
}
}

When I try to add a new record it tries to automatically pluralize the table name and gets an error that says "{"Invalid object name 'dbo.PersonalDatas'."}"

So I want to do a mapping in my dbcontext class like so:

[Code]....

But I keep getting a design time error:

Error 1 'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<MyApp.Models.PersonalData>' does not contain a definition for 'MapSingleType' and no extension method 'MapSingleType' accepting a first argument of type 'System.Data.Entity.ModelConfiguration.EntityTypeConfiguration<Myapp.Models.PersonalData>' could be found (are you missing a using directive or an assembly reference?)

[Code]....