Ferret giving error on runing ruby server

Hi All,

i have install ferret finely but now when i m running my server its
giving me following error can any body help me out

D:\bear>ruby script/server
=> Booting Mongrel (use ‘script/server webrick’ to force WEBrick)
=> Rails 2.1.1 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment…
Exiting
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependenci
es.rb:279:in load_missing_constant': uninitialized constant Ferret (NameError) from C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo rt/dependencies.rb:468:in const_missing’
from
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo
rt/dependencies.rb:480:in const_missing' from D:/bear/config/environment.rb:19 from C:/Ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/initializer.rb:95:in run’
from D:/bear/config/environment.rb:13
from
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in ge m_original_require' from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in re
quire’
from
C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_suppo
rt/dependencies.rb:510:in require' ... 23 levels... from C:/Ruby/lib/ruby/gems/1.8/gems/rails-2.1.1/lib/commands/server.rb:3 9 from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in ge
m_original_require’
from
C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `re
quire’
from script/server:3

Thanks in Advnace

Regards