[Radiant] ActiveRecordStore Error

[1842759193]

Has anyone seen Radiant ver 0.6.4 throw this error?

sudo script/server -e production
=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with production environment...
Exiting
/usr/local/lib/ruby/gems/1.8/gems/radiant-0.6.4/vendor/rails/activesupport/lib/active_support/dependencies.rb:477:in
`const_missing': uninitialized constant CGI::Session::ActiveRecordStore
(NameError)

Apart from configurations to enable the mailer, I haven't made any
modifications to the system.

Thanks in advance, 1842759193