Redmine

I want to Import datas from the .csv file to redmine ,but after I choose the .csv file and click upload button ,the Column Matching screen does not display, instead an information comes out as follows:Internal error,An error occurred on the page you were trying to access.If you continue to experience problems please contact your Redmine administrator for assistance.If you are the Redmine administrator, check your log files for details about the error. Can anyone help me ?I don't know why?

Furthermore,the log information shows as follows:
Completed 500 Internal Server Error in 160ms
ArgumentError (wrong number of arguments (2 for 0)):
plugins/redmine_importer/app/controllers/importer_controller.rb:51:in `initialize'
plugins/redmine_importer/app/controllers/importer_controller.rb:51:in `new'
plugins/redmine_importer/app/controllers/importer_controller.rb:51:in `match'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:167:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:18:in `process_action'
activesupport (3.2.13) lib/active_support/callbacks.rb:469:in `_run__1265134916__process_action__290740388__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `send'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `send'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/abstract_controller/callbacks.rb:17:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
actionpack (3.2.13) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (3.2.13) lib/abstract_controller/base.rb:121:in `process'
actionpack (3.2.13) lib/abstract_controller/rendering.rb:45:in `process'
actionpack (3.2.13) lib/action_controller/metal.rb:203:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
actionpack (3.2.13) lib/action_controller/metal.rb:246:in `action'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:36:in `call'
journey (1.0.4) lib/journey/router.rb:68:in `call'
journey (1.0.4) lib/journey/router.rb:56:in `each'
journey (1.0.4) lib/journey/router.rb:56:in `call'
actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
rack-openid (1.3.1) lib/rack/openid.rb:98:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
rack (1.4.5) lib/rack/etag.rb:23:in `call'
rack (1.4.5) lib/rack/conditionalget.rb:35:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/flash.rb:242:in `call'
rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `call'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__1611628533__call__4__callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `send'
activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `send'
activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.5) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.5) lib/rack/lock.rb:15:in `call'
actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
rack-cache (1.2) lib/rack/cache/context.rb:143:in `pass'
rack-cache (1.2) lib/rack/cache/context.rb:155:in `invalidate'
rack-cache (1.2) lib/rack/cache/context.rb:71:in `call!'
rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
railties (3.2.13) lib/rails/engine.rb:479:in `call'
railties (3.2.13) lib/rails/application.rb:223:in `call'
railties (3.2.13) lib/rails/railtie/configurable.rb:30:in `send'
railties (3.2.13) lib/rails/railtie/configurable.rb:30:in `method_missing'
passenger (4.0.5) lib/phusion_passenger/rack/thread_handler_extension.rb:77:in `process_request'
passenger (4.0.5) lib/phusion_passenger/request_handler/thread_handler.rb:140:in `accept_and_process_next_request'
passenger (4.0.5) lib/phusion_passenger/request_handler/thread_handler.rb:108:in `main_loop'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:441:in `start_threads'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:435:in `initialize'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:435:in `new'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:435:in `start_threads'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:434:in `times'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:434:in `start_threads'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:433:in `synchronize'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:433:in `start_threads'
passenger (4.0.5) lib/phusion_passenger/request_handler.rb:200:in `main_loop'
passenger (4.0.5) helper-scripts/rack-preloader.rb:130