Hobo Hobo

I used Hobo ajax form with update attribute and the problem is that the field who's id in update attribute isn't updated :
rails -v => 3.0.9
ruby -v => ruby 1.9.2p180 (2011-02-18) [i386-mingw32]
hobo gems
* hobo (1.3.0.RC) * hobo_fields (1.3.0.RC) * hobo_support (1.3.0.RC) Tell me if you need others gem version.

description :

the form :

 <div part="testzone">
    text to replace
  </div>
  <form action="#{url_for(:action => 'update_exe')}" success="alert('success')" update="testzone">
    <button id="updatebutton">Update</button>
  </form>

the html generated :

<div id="testzone">
        text to replace
  </div>
<form action="/passerelles/10-aptalis/update_exe" method="post" onsubmit="Hobo.ajaxRequest(this, ['testzone'], {onSuccess:function(request){alert('success')}}); return false;"><div class="hidden-fields"><input id="page_path" name="page_path" type="hidden" value="/passerelles/10-aptalis"><input name="authenticity_token" type="hidden" value="70YyqgiXJxhY82JiPlPVBC1p2KhIa8wuZ9jPNXp2ArA="></div>
    <button id="updatebutton">Update</button>
  </form>

the controller's method :

web_method update_exe
def update_exe
    render :text => "new text"
  end

##the console's logs :##

Started POST "/passerelles/10-aptalis/update_exe" for 127.0.0.1 at 2012-01-30 09
:31:20 +0100




[.......]




Processing by PasserellesController#update_exe as JS
  Parameters: {"authenticity_token"=>"70YyqgiXJxhY82JiPlPVBC1p2KhIa8wuZ9jPNXp2Ar
A=", "render"=>{"0"=>{"part_context"=>"BAhbCDoQdGVzdHpvbmViaXNJIhJwYXNzZXJlbGxlO
jEwBjoGRUZbAA==--94267fb5b9bb36de489340d7528c15ebb4946c28\n", "id"=>"testzonebis
"}}, "page_path"=>"/passerelles/10-aptalis", "_"=>"", "id"=>"10-aptalis"}
  ←[1m←[36mUser Load (2.0ms)←[0m  ←[1mSELECT "users".* FROM "users" WHERE "users
"."id" = 1 LIMIT 1←[0m
Rendered text template (0.0ms)
Completed 200 OK in 80ms (Views: 3.0ms | ActiveRecord: 18.0ms)

When I click on the update button, the request is done and nothing is replaced.
Request is cool, I have and alert that tell me the ajax request is a success.
I see in the log's that my controller send me back some text.

But the fields arn't replaced by anything.

I don't see any subject speak about this.

This is a bug or am I really bad ?!!