ruby on rails -v gives error - ruby-on-rails

Question

i am getting this error below
/usr/lib64/ruby/site_ruby/1.8/rubygems.rb:926:in `report_activate_error': Could not find RubyGem rails (>= 0) (Gem::LoadError)
from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:244:in `activate_dep'
from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:236:in `activate'
from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:1307:in `gem'
from /usr/bin/rails:18
i started with a ruby 1.8.7 & rails 2.3.11
then i installed rvm
then installed ruby 2.0.0 & gem install rails 3.2.13
then started getting this error above.
any help will be appreciated, thanks.
i think it's a path issue of some sort but can't figure out, don't know much about unix stuff. i don't have root privs by the way.
this is my .bashrc if helps
# .bashrc
# User specific aliases and functions
alias mv='mv -i'
alias rm='rm -i'
alias cp='cp -i'
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting
export HPATH=$HOME
export GEM_HOME=$HPATH/ruby/gems
export GEM_PATH=$GEM_HOME:/usr/lib64/ruby/gems/1.8
export GEM_CACHE=$GEM_HOME/cache
export PATH=$PATH:$HPATH/ruby/gems/bin
export PATH=$PATH:$HPATH/ruby/gems
this is .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin
export PATH
unset USERNAME
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM$

Answer 1

rvm use 2.0.0
will switch to ruby 2.0.0
You can then install rails and create a gemset named rails-3.2.13
rvm use 2.0.0#rails-3.2.13 --create
then
gem install rails -v 3.2.13
you can also pass the --default switch to make 2.0.0 the default ruby
you can see a list if all installed ruby versions and which one is current and or default using
rvm list
this produces output like this
rvm rubies
ruby-1.9.3-p385 [ x86_64 ]
=* ruby-1.9.3-p392 [ x86_64 ]
ruby-2.0.0-p0 [ x86_64 ]
# => - current
# =* - current && default
# * - default
UPDATE
Also, This seems like a PATH issue since your last comment. Im not sure about your bash_profile but the PATH may be wrong for rvm. Just use
export PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH"
# Load RVM into a shell session *as a function*
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
in your bash_profile
and in your `.bashrc' try this
PATH=$PATH:$HOME/.rvm/bin # Add RVM to PATH for scripting