Form_for with nested resources expects different path

Hi guys, I have a problem with form_for helper method.

Scenario:

My models


Org::Organization and Org::Member

routes.rb


namespace :org do

resources :organizations do

   resources :members

end

end

so, Rails creates helper methods like this:
org_organization_members_path,
when i tried use the form_for:

form_for [@organization, @member ] do

end

it occurs the error:

ActionView::Template::Error:

   undefined method `org_organization_org_members_path' for

#<#Class:0x007ff90b3645c8:0x007ff90b3c11b0>

Why rails is defining the helper method like
org_organization_members_path
and form_for is expecting org_organization_org_members_path ?

I’m actually using rails 3.2.1.

Thanks,

Everton Cardoso