Redmine

ruby script/server webrick -e production
/usr/local/rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/dependency.rb:296:in `to_specs': Could not find 'rails' (= 2.3.14) among 5 total gem(s) (Gem::LoadError)
from /usr/local/rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/dependency.rb:307:in `to_spec'
from /usr/local/rvm/rubies/ruby-1.8.7-p374/lib/ruby/site_ruby/1.8/rubygems/core_ext/kernel_gem.rb:47:in `gem'
from /home/app/redmine/config/boot.rb:65:in `load_rails_gem'
from /home/app/redmine/config/boot.rb:59:in `load_initializer'
from /home/app/redmine/config/boot.rb:43:in `run'
from /home/app/redmine/config/boot.rb:16:in `boot!'
from /home/app/redmine/config/boot.rb:119
from script/server:2:in `require'
from script/server:2

hoe can fix it