Fluent NHibernate - key mapping composed one to many

I'm having a problem mapping an entity to Fluent NHibernate .

I have a 1-N relationship with the two tables in the bank having composite keys.

When I try to list my User entity it returns an error, but this happens only when I create the relationship with the entity AccessDepartment

UserMap

public class UsuarioMap : ClassMap<Usuario>
{
    public UsuarioMap()
    {
        CompositeId()
            .KeyProperty(x => x.Email, "Usuario")
            .KeyReference(x => x.Empresa, "CodEmp")
            .KeyProperty(x => x.CodigoFilial, "Filial");

        Map(x => x.Nome, "Nome");
        Map(x => x.AcessoTodosDepartamentos, "AllDeptos");
        Map(x => x.AcessoTodosPedidos, "allPed");
        Map(x => x.Email, "email");
        Map(x => x.NivelUsuario, "UsrTipo")
            .CustomType<NivelUser>();
        Table("Usuario");

        References<Empresa>(x => x.Empresa, "CodEmp");
        References<CentroCusto>(x => x.CentroCusto, "CCusto");
        References<Departamento>(x => x.Departamento)
            .Column("CodDep");

        HasMany<AcessoDepartamento>(x => x.AcessoDepartamentos)
            .KeyColumn("AcessoDep");
    }
}

AccessMap

public class AcessoDepartamentoMap : ClassMap<AcessoDepartamento>
{
    public AcessoDepartamentoMap()
    {
        CompositeId()
            .KeyProperty(x => x.AcessoDep, "AcessoDep")
            .KeyReference(x => x.Departamento, "CodDep");

        Map(x => x.CodigoFilial, "Filial");
        Table("AcessoDep");

        References<Departamento>(x => x.Departamento)
            .Column("CodDep");
        References<Empresa>(x => x.Empresa)
            .Column("CodEmp");
    }
}

I've tried everything I've ever seen from the searches I've done and nothing so far, but this bug keeps coming back:

  

Foreign key (FK44A92FD8F30CB372: AccessDep [AccessDep])) must have same   number of columns as the referenced primary key (User,   CodEmp, Branch])

How can I resolve?