Nokogiri installation issue

Hi, I am facing issue in installing “nokogiri”

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\rakshiar>gem install “nokogiri”
WARNING: Error fetching data: SocketError: getaddrinfo: No such host is
known.
(http://rubygems.org/latest_specs.4.8.gz)
ERROR: While executing gem … (Errno::EACCES)
Permission denied -
C:/Ruby193/lib/ruby/gems/1.9.1/gems/nokogiri-1.5.6-x86-m
ingw32

C:\Documents and Settings\rakshiar>gem install nokogiri
WARNING: Error fetching data: SocketError: getaddrinfo: No such host is
known.
(http://rubygems.org/latest_specs.4.8.gz)
ERROR: While executing gem … (Errno::EACCES)
Permission denied -
C:/Ruby193/lib/ruby/gems/1.9.1/gems/nokogiri-1.5.6-x86-m
ingw32

C:\Documents and Settings\rakshiar>

Can anyone help me please?

tried the below:

gem install --http-proxy http://USERNAME:PASS@HOST:PORT gem_name as

C:>gem install --http-proxy http://3.25.138.5:88 nokogiri
Fetching: nokogiri-1.5.9-x86-mingw32.gem (100%)
ERROR: While executing gem … (Errno::EACCES)
Permission denied -
C:/Ruby193/lib/ruby/gems/1.9.1/cache/nokogiri-1.5.9-x86-
mingw32.gem

C:>