Based on my previous thread : RVM installed by Ruby not working? where i had installed RVM using the root user, I then had to entirely remove the RVM install and now i am in
Look for file rvm.sh below /etc directory (It may be in /etc, or /etc/init.d).
Also, try some grep rvm /etc -r, so you can find some files/lines which prevent you from installing rvm in your $HOME dir.