Topic: Devise on ginjo-rfm

I'm using the ginjo-RFM gem for connecting to a Filemaker Database, and want to use Devise for authentication. The problem with this is the fact that Devise requires my User model to inherit from ActiveRecord::Base - and RFM requires, for it to access the database at all, to inherit from Rfm::Base. Is it possible to let my User class inherit from both Rfm::Base and ActiveRecord::Base?

User.rb (model)

class User < Rfm::Base
require 'rfm'
rolify
config :layout => 'XXXXXX' #Connecting Rails to the FileMaker layout
devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable

attr_accessible :role_ids, :as => :admin
attr_accessible :name, :email, :password, :password_confirmation, :remember_me

end

This will fail 'cause devise relies on ActiveRecord::Base and vice versa. Any ideas?

Ginjo-rfm: http://rubygems.org/gems/ginjo-rfm

Devise: https://github.com/plataformatec/devise