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
error.

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...
/usr/local/rubygems/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:
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:in `require'
        from /usr/local/rubygems/gems/gems/activesupport-1.4.2/lib/
active_support/dependencies.rb:495:in `require'

Thanks,
-S