Smtp_tls (MissingSourceFile) error

Hello Folks,

I am trying to setup a new dedicated virtual server with a hosting
company. When I try to start my mongrel_cluster I get the following

Google serach on where to find smtp_tls or if I am missing something
in my path somewhere didn’t help. Any thoughts/pointers on how to
address this error are appreciated.

** Starting Rails with production environment…
27:in gem_original_require': no such file to load -- smtp_tls (MissingSourceFile) from /usr/local/rubygems/lib/ruby/site_ruby/1.8/rubygems/ custom_require.rb:27:inrequire’
from /usr/local/rubygems/gems/gems/activesupport-1.4.2/lib/
active_support/dependencies.rb:495:in `require’