Error on fluent-logger and msgpack-jruby

gistfile1.txt

This file is exist, but fluent-logger dose not use this file.
/usr/local/stow/ruby-1.7.0-jruby/lib/ruby/gems/shared/gems/msgpack-jruby-1.3.0-java/lib/msgpack.rb


error message is:

    backtrace is /usr/local/stow/ruby-1.7.0-jruby/lib/ruby/shared/rubygems/custom_require.rb:55:in `require'
    /usr/local/stow/ruby-1.7.0-jruby/lib/ruby/gems/shared/gems/fluent-logger-0.4.3/lib/fluent/logger    /fluent_logger.rb:18:in `(root)'
    /home/kiyoka/work/github/pastehub/lib/pastehub/log.rb:1:in `(root)'
    /home/kiyoka/work/github/pastehub/lib/pastehub/log.rb:22:in `initialize'

    Exception in Ruby verticle: C extensions are disabled, can't load `/usr/local/stow/ruby-1.7.0-jruby/lib/ruby/gems/shared/gems/msgpack-0.4.7/lib/msgpack.so'
    /usr/local/stow/ruby-1.7.0-jruby/lib/ruby/shared/rubygems/custom_require.rb:55:in `require'
    /usr/local/stow/ruby-1.7.0-jruby/lib/ruby/gems/shared/gems/fluent-logger-0.4.3/lib/fluent/logger /fluent_logger.rb:18:in `(root)'
    /home/kiyoka/work/github/pastehub/lib/pastehub/log.rb:1:in `(root)'
    /home/kiyoka/work/github/pastehub/lib/pastehub/log.rb:22:in `initialize'