Ruby on Rails issue

I encountered an issue when trying to get WEBrick to start on my server:

[root@ip 13:07:59]script/server
/var/www/vhosts/nickthompson.name/httpdocs/emporium/config/boot.rb:18:in `require': no such file to load -- initializer (LoadError)
from /var/www/vhosts/nickthompson.name/httpdocs/emporium/config/boot.rb:18:in `'
from script/server:2:in `require'
from script/server:2:in `

There was no such thing as a ‘initializer’ gem to install (and trying to install it via gem install did not work) and after much tinkering around, this problem was resolved by installing Rails to 2.3.5. An upgrade of RubyGems to 1.3.5 was also done prior to this, but I don’t know if this contributed to the issue getting fixed.