Newbie Apache Install

trying to get mod_ruby to work with my apache 2.0 install. Here's my config...

<IfModule mod_ruby.c>
        # for Apache::RubyRun
        RubyRequire apache/ruby-run

        # exec files under /ruby as ruby scripts.
        <Location /ruby>
                SetHandler ruby-object
                RubyHandler Apache::RubyRun.instance
        </Location>

        # Give ruby CGI capability
        <Directory /home/<myuser>/<mydomain>/http/ruby>
                Options +ExecCGI
        </Directory>

        # exec *.rbx as ruby scripts.
        <Files *.rbx>
                SetHandler ruby-object
                RubyHandler Apache::RubyRun.instance
        </Files>
</IfModule>

The above config gives me the following errors for <mydomain>/ruby/test.rbx
[error] mod_ruby: error in ruby
[error] mod_ruby: (eval): (eval): uninitialized constant
Apache::RubyRun (NameError)
[error] mod_ruby:   from (eval):0:in `value'

I've seen threads about these errors, but none that have helped me so far.