mongrel-cluster

I'm getting the following error on log/mongrel.6001.log I'm using mongrel_cluster , rails 3 and ruby 1.8.7 I start mongrel_cluster using mongrel_rails cluster::start But when I try to access the page on browser I get the error bellow "Error calling Dispatcher.dispatch # Mon Oct 11 00:26:04 -0500 2010: Error calling Dispatcher.dispatch #<NameError: uninitialized constant ActionController::CgiRequest> /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:76:in `process' /usr/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in `synchronize' /usr/lib/ruby/gems/1