Error when set up task scheduler

[dokhoua]

In Redmine 1.1.3, I followed the guide at https://github.com/alvila/redmine_reminder to install redmine_installer plugin. When running the command rake redmine:send_reminders_all days=1RAILS_ENV=production, it got an error:

NOTE: SourceIndex.new(hash) is deprecated; From /usr/share/redmine/config/../vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:100:in 'new'.
Please install RDoc 2.4.2+ to generate documentation.
config.load_paths os deprecated and removed in Rails 3, please use autoload_paths instead
config.load_paths= is deprecated and remove in Rails 3, please use aitoload_paths= instead

Could you help me to solve this problem. Besides, I want to modify this plugin to automatically send reminder email base on due date of each issues. Could this plugin do that?

Thank you for all your helps!

[dokhoua]

no one can help me?