refinery in rails 3.1 production mode

[keram]

/home/keram/gems/gems/actionpack-3.1.1/lib/action_dispatch/middleware/stack.rb:119:in assert_index': No such middleware to insert after: ActionDispatch::Static (RuntimeError) from /home/keram/gems/gems/actionpack-3.1.1/lib/action_dispatch/middleware/stack.rb:91:ininsert_after'
from /home/keram/web-data/project/vendor/refinerycms-snippets/lib/refinerycms-snippets.rb:21
from /home/keram/gems/gems/railties-3.1.1/lib/rails/initializable.rb:30:in instance_exec' from /home/keram/gems/gems/railties-3.1.1/lib/rails/initializable.rb:30:inrun'
from /home/keram/gems/gems/railties-3.1.1/lib/rails/initializable.rb:55:in run_initializers' from /home/keram/gems/gems/railties-3.1.1/lib/rails/initializable.rb:54:ineach'
from /home/keram/gems/gems/railties-3.1.1/lib/rails/initializable.rb:54:in run_initializers' from /home/keram/gems/gems/railties-3.1.1/lib/rails/application.rb:96:ininitialize!'
from /home/keram/gems/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:in send' from /home/keram/gems/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:inmethod_missing'
from /home/keram/web-data/project/config/environment.rb:5
from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:in require' from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:inrequire'
from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in load_dependency' from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:640:innew_constants_in'
from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:223:in load_dependency' from /home/keram/gems/gems/activesupport-3.1.1/lib/active_support/dependencies.rb:240:inrequire'
from /home/keram/web-data/project/config.ru:4
from /home/keram/gems/gems/rack-1.3.5/lib/rack/builder.rb:51:in instance_eval' from /home/keram/gems/gems/rack-1.3.5/lib/rack/builder.rb:51:ininitialize'
from /home/keram/web-data/project/config.ru:1:in `new'
from /home/keram/web-data/project/config.ru:1