Unable to install Phusion passenger

i tried to install Phusion passenger ,when is issued
sudo gem install passenger;
I got
following
error messages

WARNING: RubyGems 1.2+ index not found for:

RubyGems will revert to legacy indexes degrading performance.
ERROR: Could not find a valid gem ‘passenger’ (>= 0) in any repository

Please help.
Thanks

On Sat, Apr 16, 2011 at 12:33 AM, amritpal pathak
<[email protected]

wrote:

This should help you get passed this issue.

http://stackoverflow.com/questions/1855021/gem-install-error-index-not-found-ruby-on-rails

First thing I would check is to make sure that system you are running
the
command on has access to the internet.

B.