Gem Load Error about whois command and removed cache

I have an awesome trouble with Gem. After executing this command:

rm -f /usr/local/lib/ruby/gems/1.9.1/cache/*

I can not do any thing. If I try for instance: gem cleanup I get this kind of answer:

/usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/gemwhois.rb:3:in `require': no such file to load -- rubygems/commands/whois (LoadError)
    from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/gemwhois.rb:3:in `<top (required)&g开发者_StackOverflow社区t;'
    from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/rubygems_plugin.rb:2:in `require'
    from /usr/local/lib/ruby/gems/1.9.1/gems/gemwhois-0.1/lib/rubygems_plugin.rb:2:in `<top (required)>'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1113:in `load'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1113:in `block in <top (required)>'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1105:in `each'
    from /usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1105:in `<top (required)>'
    from <internal:gem_prelude>:235:in `require'
    from <internal:gem_prelude>:235:in `load_full_rubygems_library'
    from <internal:gem_prelude>:334:in `const_missing'
    from /usr/local/bin/gem:12:in `<main>'

It's the same for gem -v, of just gem command...

I'm working of Snow Leopard. What should the best solution about you?

Thanks a lot!

Yay! now it's solved AHAHAH~

My solution was:

cd /usr/local/lib/ruby/gems/1.9.1/gems/
sudo rm -r gemwhois-0.*

Ruby is cool. Have fun.