ruby - Error when installing gems Windows 8 -

ruby - Error when installing gems Windows 8 -

i'm having next error after installing ruby on windows 8, i've uninstalled several times, fired commands gem cleanup, removed .gem folder, ruby folder, environment variables, btut nil seems work.

here logs of errors encountering

ruby 1.9.3p385 (2013-02-06) [i386-mingw32] c:\users\david>gem update updating installed gems error: while executing gem ... (gem::remotefetcher::fetcherror) socketerror: getaddrinfo: no such host known. (http://rubygems.org/lates t_specs.4.8.gz) c:\users\david>gem install compass error: not find valid gem 'compass' (>= 0) in repository error: while executing gem ... (gem::remotefetcher::fetcherror) socketerror: getaddrinfo: no such host known. (http://rubygems.org/lates t_specs.4.8.gz) c:\users\david>gem env rubygems environment: - rubygems version: 1.8.24 - ruby version: 1.9.3 (2013-02-06 patchlevel 385) [i386-mingw32] - installation directory: c:/ruby193/lib/ruby/gems/1.9.1 - ruby executable: c:/ruby193/bin/ruby.exe - executable directory: c:/ruby193/bin - rubygems platforms: - ruby - x86-mingw32 - gem paths: - c:/ruby193/lib/ruby/gems/1.9.1 - c:/users/david/.gem/ruby/1.9.1 - gem configuration: - :update_sources => true - :verbose => true - :benchmark => false - :backtrace => false - :bulk_threshold => 1000 - remote sources: - http://rubygems.org/ c:\users\david>gem -v 1.8.24 c:\users\david>ruby -v ruby 1.9.3p385 (2013-02-06) [i386-mingw32] c:\users\david>

ruby windows gem