not able to install rails3 on rvm

Question

When trying to install rails3 using rvm, I get following error.

$ gem install rails
/data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:28:in `<top (required)>': uninitialized constant Gem::ConfigFile (NameError)
        from /data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from /data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from /data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/gem_runner.rb:8:in `<top (required)>'
        from /data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from /data/home/manish/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from /data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin/gem:9:in `<main>'

Here is my rvm information

$ rvm info

ruby-1.9.2-p180:

  system:
    uname:       "Linux alioth-linux.gslab.com 2.6.23.1-42.fc8 #1 SMP Tue Oct 30 13:55:12 EDT 2007 i686 i686 i386 GNU/Linux"
    bash:        "/bin/bash => GNU bash, version 3.2.25(1)-release (i386-redhat-linux-gnu)"
    zsh:         "/bin/zsh => zsh 4.3.4 (i386-redhat-linux-gnu)"

  rvm:
    version:      "rvm 1.6.2 by Wayne E. Seguin ([email protected]) [https://rvm.beginrescueend.com/]"

  ruby:
    interpreter:  "ruby"
    version:      "1.9.2p180"
    date:         "2011-02-18"
    platform:     "i686-linux"
    patchlevel:   "2011-02-18 revision 30909"
    full_version: "ruby 1.9.2p180 (2011-02-18 revision 30909) [i686-linux]"

  homes:
    gem:          "/data/home/manish//.rvm/gems/ruby-1.9.2-p180"
    ruby:         "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180"

  binaries:
    ruby:         "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin/ruby"
    irb:          "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin/irb"
    gem:          "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin/gem"
    rake:         "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin/rake"

  environment:
    PATH:         "/data/home/manish//.rvm/gems/ruby-1.9.2-p180/bin:/data/home/manish//.rvm/gems/ruby-1.9.2-p180@global/bin:/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/bin:/data/home/manish//.rvm/bin:/data/home/manish/ec2-api-tools-1.4.0.2/bin:/data/data/work/java/jdk1.6.0_18/bin:/usr/kerberos/bin:/usr/lib/ccache:/usr/local/bin:/bin:/usr/bin:/data/home/manish//bin"
    GEM_HOME:     "/data/home/manish//.rvm/gems/ruby-1.9.2-p180"
    GEM_PATH:     "/data/home/manish//.rvm/gems/ruby-1.9.2-p180:/data/home/manish//.rvm/gems/ruby-1.9.2-p180@global"
    MY_RUBY_HOME: "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180"
    IRBRC:        "/data/home/manish//.rvm/rubies/ruby-1.9.2-p180/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

Thanks for any help.
Regards,
Manish

Answer 1

Do

rvm rubygems remove

Which will then say:

Removing old Rubygems files...

Installing rubygems dedicated to ruby-1.9.2-p180...

After which the gem command worked.

Edit: Nevermind, seems there's more to it.