Class namespace

I am trying to organize some of my classes in to namespaces using something like this:

module FileSystem   class Explorer     include Reloadable   end end

Everything is fine until a decide to "reload!" on the console. I am getting the following error:

NameError: uninitialized constant Explorer         from C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/depe ndencies.rb:123:in `const_missing'

Therefore I have to 'exit' and launch the Console again whenver I change something in my code. Is there a way to prevent this?

Thanks in advance,