Redmine

I try install ezSidebar on my redmine (0.8.4) but i have a error, any idea

1. git clone git://github.com/zouchaoqun/ezsidebar.git redmine_ezsidebar
2. rake db:migrate_plugins RAILS_ENV=production
   • Invoke db:migrate_plugins (first_time)
   • Invoke environment (first_time)
   • Execute environment
     rake aborted!
     can't convert Hash into String
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:190:in `iconv'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:190:in `load_localized_strings'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:189:in `each'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:189:in `load_localized_strings'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:188:in `open'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:188:in `load_localized_strings'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:175:in `each'
     /usr/home/www/redmine/vendor/plugins/gloc-1.1.0/lib/gloc.rb:175:in `load_localized_strings'
     /usr/home/www/redmine/config/initializers/30-redmine.rb:4
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:503:in `load'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:503:in `load'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in `new_constants_in'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:503:in `load'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:484:in `load_application_initializers'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:483:in `each'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:483:in `load_application_initializers'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:149:in `process'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:97:in `send'
     /usr/home/www/redmine/vendor/rails/railties/lib/initializer.rb:97:in `run'
     /usr/home/www/redmine/config/environment.rb:20
     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
     /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in `require'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in `new_constants_in'
     /usr/home/www/redmine/vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in `require'
     /usr/home/www/redmine/vendor/rails/railties/lib/tasks/misc.rake:3
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
     /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
     /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
     /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
     /usr/local/bin/rake:19:in `load'
     /usr/local/bin/rake:19@