migrating to ruby 1.9.3 from 1.8.7

error with delayed_job even with the version 3.0.3

-sh-4.2$ rails s
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/systemu-2.2.0/lib/systemu.rb:29: Use RbConfig instead of obsolete and deprecated Config.
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/soap4r-1.5.8/lib/xsd/charset.rb:13: warning: variable $KCODE is no longer effective
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/activesupport-3.0.10/lib/active_support/dependencies.rb:239:in `block in require': iconv will be deprecated in the future, use String#encode instead.
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/soap4r-1.5.8/lib/soap/property.rb:68: warning: encoding option is ignored - u
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/soap4r-1.5.8/lib/soap/property.rb:69: warning: encoding option is ignored - u
/usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/soap4r-1.5.8/lib/soap/property.rb:70: warning: encoding option is ignored - u
=> Booting WEBrick
=> Rails 3.0.10 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
/home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config/initializers/delayed_job.rb:2:in `block in <top (required)>': uninitialized constant Delayed::Job (NameError)
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/activesupport-3.0.10/lib/active_support/core_ext/kernel/reporting.rb:11:in `block in silence_warnings'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/activesupport-3.0.10/lib/active_support/core_ext/kernel/reporting.rb:22:in `with_warnings'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/activesupport-3.0.10/lib/active_support/core_ext/kernel/reporting.rb:11:in `silence_warnings'
	from /home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config/initializers/delayed_job.rb:1:in `<top (required)>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/engine.rb:201:in `block (2 levels) in <class:Engine>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/engine.rb:200:in `each'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/engine.rb:200:in `block in <class:Engine>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/initializable.rb:25:in `instance_exec'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/initializable.rb:25:in `run'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/initializable.rb:50:in `block in run_initializers'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/initializable.rb:49:in `each'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/initializable.rb:49:in `run_initializers'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/application.rb:134:in `initialize!'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/application.rb:77:in `method_missing'
	from /home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config/environment.rb:5:in `<top (required)>'
	from /home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config.ru:3:in `block in <main>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/builder.rb:46:in `instance_eval'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/builder.rb:46:in `initialize'
	from /home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config.ru:1:in `new'
	from /home/local/PENNYWISE/venkatab/Desktop/work_space/redzone-latest-updated/config.ru:1:in `<main>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/builder.rb:35:in `eval'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/builder.rb:35:in `parse_file'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/server.rb:162:in `app'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/server.rb:253:in `wrapped_app'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/rack-1.2.5/lib/rack/server.rb:204:in `start'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/commands/server.rb:65:in `start'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/commands.rb:30:in `block in <top (required)>'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/commands.rb:27:in `tap'
	from /usr/local/rvm/gems/ruby-1.9.3-p0@redzone/gems/railties-3.0.10/lib/rails/commands.rb:27:in `<top (required)>'
	from script/rails:6:in `require'
	from script/rails:6:in `<main>'