Entity Framework Entity Splitting Into a single POCO - entity-framework

Question

I'm using Entity Framework 6.1.3 and I want to define a single POCO class (Subscriber) which hydrates itself from three SQL tables. I have tried to follow various on-line references including this one from Deliveron. Here are the table/model definitions...
SQL Tables
CREATE TABLE [Subscriber]
(
[SubscriberId] INT NOT NULL PRIMARY KEY,
[Username] NVARCHAR(50) NOT NULL,
[Email] NVARCHAR(100) NOT NULL
)
CREATE TABLE [SubscriberDetails]
(
[SubscriberId] INT NOT NULL PRIMARY KEY,
[FirstName] NVARCHAR(50) NOT NULL,
[LastName] NVARCHAR(50) NOT NULL,
CONSTRAINT [FK_SubscriberDetails_Subscriber]
FOREIGN KEY ([SubscriberId])
REFERENCES [Subscriber] ([SubscriberId]) ON DELETE CASCADE
)
CREATE TABLE [SubscriberProfile]
(
[SubscriberId] INT NOT NULL PRIMARY KEY,
[Bio] NVARCHAR(MAX) NULL,
CONSTRAINT [FK_SubscriberProfile_Subscriber]
FOREIGN KEY ([SubscriberId])
REFERENCES [Subscriber] ([SubscriberId]) ON DELETE CASCADE
)
Domain Model
public class Subscriber {
public int SubscriberId { get; set; }
public string Username { get; set; }
public string Email { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Bio { get; set; }
};
In my DataContext OnModelCreating() method, I have added the following code:
modelBuilder.Entity<Subscriber>()
.HasKey(m => m.SubscriberId)
.Map(m => {
m.ToTable("Subscriber");
m.Properties(s => new {
s.SubscriberId,
s.UserName,
s.Email
});
})
.Map(m => {
m.ToTable("SubscriberDetails");
m.Properties(s => new {
s.FirstName,
s.LastName
});
})
.Map(m => {
m.ToTable("SubscriberProfile");
m.Properties(s => new {
s.Bio
});
});
Whilst this compiles and loads, when I try and run a query against the DataContext I get the following error:
System.Data.SqlClient.SqlException: Invalid object name
'dbo.Subscriber21'
Can anyone give me any direction on what I am doing wrong?