Zlib error

Hi,

After installing the rubygems 1.3.1, I face the following issues while installing new gems.

Error:

arun@mysystem:~/Desktop$ sudo gem install ip2country-0.0.2.gem

ERROR: While executing gem ... (Zlib::GzipFile::Error)     not in gzip format

My Environment:

OS - ubuntu 8.04 - the Hardy Heron version.

Ruby - ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]

RubyGems Environment:   - RUBYGEMS VERSION: 1.3.1   - RUBY VERSION: 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]   - INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8   - RUBY EXECUTABLE: /usr/bin/ruby1.8   - EXECUTABLE DIRECTORY: /usr/bin   - RUBYGEMS PLATFORMS:     - ruby     - x86-linux   - GEM PATHS:      - /usr/lib/ruby/gems/1.8      - /home/arun/.gem/ruby/1.8   - GEM CONFIGURATION:      - :update_sources => true      - :verbose => true      - :benchmark => false      - :backtrace => false      - :bulk_threshold => 1000   - REMOTE SOURCES:      - http://gems.rubyforge.org/

Please suggest a solution. I want to install required gems. Do i need to revert my rubygems version? because in my older version rubygems-1.0.1, i dont see any errors. is it a bug in rubygems-1.3.1 or do i need to change anything?

Thanks,

Arun.