ruby 2.0 rails gem install error "cannot load such file -- openssl"

I am using osx 10.8.2 installed ruby 2.0 and.... got this when trying to run "sudo gem install rails"

$ sudo gem install railsERROR:  Loading command: install (LoadError)    cannot load such file -- opensslERROR:  While executing gem ... (NoMethodError)    undefined method `invoke_with_build_args' for nil:NilClass

I had ruby 1.9.x and rails 3.2.x working alright before