Authenticatedsystem not loading?

I’m getting a strange error on my mediatemple gridserver, that I’m not
getting on my laptop. It seems like it’s not loading
authenticatedsystem? but how I tell for sure? can anyone tell me where
to start looking?

Processing HomepagesController#show (for 72.10.62.145 at 2007-04-26
12:15:44) [GET]
Session ID: 30a851e90d906c4d07b51943f3e90bd8
Parameters: {“action”=>“show”, “id”=>1, “controller”=>“homepages”}
Rendering layoutfalseactionshowcontent_typetext/html within
layouts/homepages
Rendering homepages/show

ActionView::TemplateError (undefined method logged_in?' for #<#<Class:0xb766f2f8>:0xb7616810>) on line #5 of app/views/homepages/show.rhtml: 2: <div id="body"> 3: <%= @homepage.body %> 4: </div> 5: <% if logged_in? then %> 6: <%= link_to 'Edit', edit_homepage_path(@homepage) %> | 7: <%= link_to 'Back', homepages_path %> 8: <% end %> #{RAILS_ROOT}/app/views/homepages/show.rhtml:5:in_run_rhtml_47app47views47homepages47show46rhtml’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:326:in
send' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:326:incompile_and_render_template’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:301:in
render_template' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_view/base.rb:260:inrender_file’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:806:in
render_file' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:738:inrender_with_no_layout’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:863:in
render_without_layout' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:798:inrender_action_without_active_scaffold’
#{RAILS_ROOT}/vendor/plugins/active_scaffold/lib/extensions/action_controller.rb:24:in
render_action' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:748:inrender_with_no_layout’
#{RAILS_ROOT}/vendor/rails/activesupport/lib/active_support/deprecation.rb:43:in
silence' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:747:inrender_with_no_layout’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/layout.rb:244:in
render_without_benchmark' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:inrender_without_active_scaffold’
/usr/lib/ruby/1.8/benchmark.rb:293:in measure' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:50:inrender_without_active_scaffold’
#{RAILS_ROOT}/vendor/plugins/active_scaffold/lib/extensions/action_controller.rb:13:in
render' #{RAILS_ROOT}/app/controllers/homepages_controller.rb:25:inshow’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/mime_responds.rb:167:in
call' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/mime_responds.rb:167:inrespond’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/mime_responds.rb:161:in
each' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/mime_responds.rb:161:inrespond’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/mime_responds.rb:105:in
respond_to' #{RAILS_ROOT}/app/controllers/homepages_controller.rb:25:inshow’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1095:in
send' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:1095:inperform_action_without_filters’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:632:in
call_filter' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:634:incall_filter’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
call_filter' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:incall’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
call_filter' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:incall_filter’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:438:in
call' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:incall_filter’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:638:in
call_filter' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:449:incall’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:637:in
call_filter' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:619:inperform_action_without_benchmark’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' /usr/lib/ruby/1.8/benchmark.rb:293:inmeasure’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/benchmarking.rb:66:in
perform_action_without_rescue' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/rescue.rb:83:inperform_action’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:430:in
send' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:430:inprocess_without_filters’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/filters.rb:624:in
process_without_session_management_support' #{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/session_management.rb:114:inprocess’
#{RAILS_ROOT}/vendor/rails/actionpack/lib/action_controller/base.rb:330:in
process' #{RAILS_ROOT}/vendor/rails/railties/lib/dispatcher.rb:41:indispatch’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/rails.rb:78:in
process' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/rails.rb:76:insynchronize’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/rails.rb:76:in
process' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:618:inprocess_client’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:617:in
each' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:617:inprocess_client’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:736:in
run' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:736:ininitialize’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:736:in
new' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:736:inrun’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:720:in
initialize' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:720:innew’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel.rb:720:in
run' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/configurator.rb:271:inrun’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/configurator.rb:270:in
each' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/configurator.rb:270:inrun’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/bin/mongrel_rails:127:in
run' /home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/lib/mongrel/command.rb:211:inrun’
/home/17540/data/rubygems/gems/gems/mongrel-1.0.1-i386-linux/bin/mongrel_rails:243