Redmine

I am using Redmine 1.4.2. When i try to delete an attachement, i have an error :

Processing IssuesController#show (for 10.11.14.145 at 2012-05-21 13:52:22) [GET]
  Parameters: {"action"=>"show", "id"=>"13181", "controller"=>"issues"}
Rendering template within layouts/base
Rendering issues/show
Completed in 879ms (View: 814, DB: 26) | 200 OK [http://support/issues/13181]

Processing ApplicationController#index (for 10.11.14.145 at 2012-05-21 13:52:34) [POST]
  Parameters: {"authenticity_token"=>"8uPFduWYM1N/EmJ44VJ+Zm2hnMh9zPwADBSM+jPRg1U="}

ActionController::MethodNotAllowed (Only get and delete requests are allowed.):
  passenger (2.2.8) lib/phusion_passenger/rack/request_handler.rb:92:in `process_request'
  passenger (2.2.8) lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
  passenger (2.2.8) lib/phusion_passenger/railz/application_spawner.rb:385:in `start_request_handler'
  passenger (2.2.8) lib/phusion_passenger/railz/application_spawner.rb:343:in `handle_spawn_application'
  passenger (2.2.8) lib/phusion_passenger/utils.rb:184:in `safe_fork'
  passenger (2.2.8) lib/phusion_passenger/railz/application_spawner.rb:341:in `handle_spawn_application'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:163:in `start'
  passenger (2.2.8) lib/phusion_passenger/railz/application_spawner.rb:209:in `start'
  passenger (2.2.8) lib/phusion_passenger/spawn_manager.rb:262:in `spawn_rails_application'
  passenger (2.2.8) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add'
  passenger (2.2.8) lib/phusion_passenger/spawn_manager.rb:256:in `spawn_rails_application'
  passenger (2.2.8) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize'
  passenger (2.2.8) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
  passenger (2.2.8) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application'
  passenger (2.2.8) lib/phusion_passenger/spawn_manager.rb:154:in `spawn_application'
  passenger (2.2.8) lib/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:352:in `__send__'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
  passenger (2.2.8) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'

I have an empty page : http://mydomain.com/attachments/9450

I think the URL behind the delete is not welformed.