Backgroundrb devel - May 2010 - Can call worker from rails console, but does nothing from rails server

Hello,

I''m trying to call a worker like this :

MiddleMan.worker(:to_eai_worker).async_to_eai(:arg => objet)

My Worker is defined like this : 

class ToEaiWorker < BackgrounDRb::MetaWorker
  set_worker_name :to_eai_worker
  def create(args = nil)
    puts "Worker to_eai_worker cr??"
    # this method is called, when worker is loaded for the first time
  end
  
  def to_eai(objet = nil)
    puts "here we are"
    # some code
  end
end

and my backgrounrb.yml is :
--- 
:backgroundrb: 
  :ip: 0.0.0.0
  :port: 11006
  :debug_log: true

When I call the worker from rails console, it works (I can see "here we
are" in the worker log).
When I do it from an observer in my rails server, it''s never called
(but without any error).

I''m using Rails 2.3.5 on a Mac or Ubuntu.

Is there something I''m doing wrong ?

Thanks in advance for any help.
-- 
Christian