Edited Issue: Many to Many (User_Role) table is not used correctly [22]

When I define a User, Role and User_Role tables like this:
```
CREATE TABLE [dbo].[User](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NULL,
[Password] [nvarchar](50) NULL,
CONSTRAINT [PK_Users] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]


CREATE TABLE [dbo].[Role](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](50) NULL,
CONSTRAINT [PK_Roles] PRIMARY KEY CLUSTERED
(
[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

CREATE TABLE [dbo].[User_Role](
[User_Id] [bigint] NOT NULL,
[Role_Id] [bigint] NOT NULL,
CONSTRAINT [PK_User_Role] PRIMARY KEY CLUSTERED
(
[User_Id] ASC,
[Role_Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

/****** Object: ForeignKey [FK_User_Role_Role] Script Date: 07/24/2013 23:53:12 ******/
ALTER TABLE [dbo].[User_Role] WITH CHECK ADD CONSTRAINT [FK_User_Role_Role] FOREIGN KEY([Role_Id])
REFERENCES [dbo].[Role] ([Id])
GO
ALTER TABLE [dbo].[User_Role] CHECK CONSTRAINT [FK_User_Role_Role]
GO
/****** Object: ForeignKey [FK_User_Role_User] Script Date: 07/24/2013 23:53:12 ******/
ALTER TABLE [dbo].[User_Role] WITH CHECK ADD CONSTRAINT [FK_User_Role_User] FOREIGN KEY([User_Id])
REFERENCES [dbo].[User] ([Id])
GO
ALTER TABLE [dbo].[User_Role] CHECK CONSTRAINT [FK_User_Role_User]
GO
```

The Generator creates 3 classes : User, Role and User_Role. This is not correct, it should generate two classes.