“rhc setup”抛出以下错误

C:/Ruby187/lib/ruby/gems/1.8/gems/highline-1.6.19/lib/highline/system_extensions.rb:81: undefined method `dlload' for HighLine::SystemExtensions::WinAPI:Module(NoMethodError)
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/highline-1.6.19/lib/highline.rb:14
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/highline-1.6.19/lib/highline/import.rb:8
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/commander-4.1.3/lib/commander.rb:24
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rhc-1.10.7/lib/rhc.rb:30
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rhc-1.10.7/lib/rhc/cli.rb:1
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in`require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rhc-1.10.7/bin/rhc:18
    from C:/Ruby187/bin/rhc:23:in `load'
    from C:/Ruby187/bin/rhc:23
C:/Ruby187/lib/ruby/gems/1.8/gems/highline-1.6.