Redmine

Hello,

I need your help. i have a problem to use mylyn plugin of eclipse.
My Redmine version is belows,

Environment:
Redmine version 2.1.4.stable
Ruby version 1.9.3 (i386-mingw32)
Rails version 3.2.8
Environment production
Database adapter Mysql2
Redmine plugins:
redmine_ckeditor 0.2.1
redmine_mylyn_connector 2.8.2.stable

I encounter this error when i try to connect redmine server by eclipse plugin

"Unexpected status code - 404"

So, i investigated the production log of redmine which i attached.
It seems that there are some problems of setting. I don't have knowledges about ruby and rails..
Can u guide me which are wrong?

tarted GET "/redmine/mylyn/version" for 127.0.0.1 at 2013-01-09 17:14:27 +0900

ActionController::RoutingError (No route matches [GET] "/mylyn/version"):
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call'
rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch'
rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup'
rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!'
rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
railties (3.2.8) lib/rails/engine.rb:479:in `call'
railties (3.2.8) lib/rails/application.rb:223:in `call'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing'
rack (1.4.1) lib/rack/urlmap.rb:64:in `block in call'
rack (1.4.1) lib/rack/urlmap.rb:49:in `each'
rack (1.4.1) lib/rack/urlmap.rb:49:in `call'
thin (1.3.1) lib/thin/connection.rb:80:in `block in pre_process'
thin (1.3.1) lib/thin/connection.rb:78:in `catch'
thin (1.3.1) lib/thin/connection.rb:78:in `pre_process'
thin (1.3.1) lib/thin/connection.rb:53:in `process'
thin (1.3.1) lib/thin/connection.rb:38:in `receive_data'
eventmachine-1.0.0-x86 (mingw32) lib/eventmachine.rb:187:in `run_machine'
eventmachine-1.0.0-x86 (mingw32) lib/eventmachine.rb:187:in `run'
thin (1.3.1) lib/thin/backends/base.rb:61:in `start'
thin (1.3.1) lib/thin/server.rb:159:in `start'
thin (1.3.1) lib/thin/controllers/controller.rb:86:in `start'
thin (1.3.1) lib/thin/runner.rb:185:in `run_command'
thin (1.3.1) lib/thin/runner.rb:151:in `run!'
thin (1.3.1) bin/thin:6:in `<top (required)>'
bin/thin:16:in `load'
bin/thin:16:in `<main>'