[Radiant] Site5 install error

[keith]

Now trying install with gems and get the following error when trying to
unpack the application:
 
-jailshell-3.00$ ~/gems/bin/radiant --database mysql radapp
/usr/lib/site_ruby/1.8/rubygems.rb:301:in `report_activate_error': Could not
find RubyGem radiant (> 0) (Gem::LoadError)
        from /usr/lib/site_ruby/1.8/rubygems.rb:238:in `activate'
        from /usr/lib/site_ruby/1.8/rubygems.rb:76:in
`active_gem_with_options'
        from /usr/lib/site_ruby/1.8/rubygems.rb:50:in `gem'
        from /home/buyscoot/gems/bin/radiant:15
 
Driving me crazy - can any 1 help?