chacolog -ing

Railsのエラー

=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
** Rails loaded.
** Loading any Rails specific GemPlugins
Exiting
/opt/local/lib/ruby/gems/1.8/gems/rdf-redland-0.5.1.3/lib/rdf/redland.rb:31:in `initialize': undefined method `librdf_new_world' for Redland:Module (NoMethodError)
from /opt/local/lib/ruby/gems/1.8/gems/rdf-redland-0.5.1.3/lib/rdf/redland.rb:45:in `new'
from /opt/local/lib/ruby/gems/1.8/gems/rdf-redland-0.5.1.3/lib/rdf/redland.rb:45
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `gem_original_require'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in'
from /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require'
from /opt/local/lib/ruby/gems/1.8/gems/activerdf_redland-1.2.1/lib/activerdf_redland/redland.rb:7
... 36 levels...
from /opt/local/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require'
from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require'
from script/server:3
chacopen-2:~/Sites/rails_test/test chacopen$