Redmine

Hi all,

I'm trying to install DMSF plugin on Redmine 2.5.1 ( on a Centos Minimal OS Installation) but I'm receiving this kind of error message:

no such file to load -- dispatcher (LoadError)
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/var/www/html/redmine/plugins/redmine_dmsf/init.rb:20
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:251:in `require'
/var/www/html/redmine/lib/redmine/plugin.rb:133:in `load'
/var/www/html/redmine/lib/redmine/plugin.rb:124:in `each'
/var/www/html/redmine/lib/redmine/plugin.rb:124:in `load'
/var/www/html/redmine/config/initializers/30-redmine.rb:19
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:245:in `load'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:245:in `load'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:236:in `load_dependency'
/usr/lib/ruby/gems/1.8/gems/activesupport-3.2.17/lib/active_support/dependencies.rb:245:in `load'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/engine.rb:593
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/engine.rb:592:in `each'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/engine.rb:592
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/initializable.rb:30:in `instance_exec'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/initializable.rb:30:in `run'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/initializable.rb:55:in `run_initializers'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/initializable.rb:54:in `each'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/initializable.rb:54:in `run_initializers'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/application.rb:136:in `initialize!'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/railtie/configurable.rb:30:in `send'
/usr/lib/ruby/gems/1.8/gems/railties-3.2.17/lib/rails/railtie/configurable.rb:30:in `method_missing'
/var/www/html/redmine/config/environment.rb:14
config.ru:3:in `require'
config.ru:3
/usr/lib/ruby/gems/1.8/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
/usr/lib/ruby/gems/1.8/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
config.ru:1:in `new'
config.ru:1

Without using DMSF plugin Redmine works well, but something goes wrong trying to install this plugin.
Do you think that could be a problem due to dependencies?
Can someone help me!?

Thanks in advance,
Mauro T.