Problem in installing community_engine plugin

Hi,

I am new to ROR and trying to deploy the community_engine module to a
clean ROR project.

When I follow all the instructions here:

And run " ./generate plugin_migration"

I get this error:

vendor/plugins/community_engine/config/initializers/sessions_middleware.rb:1:
undefined method middleware' for ActionController::Dispatcher:Class (NoMethodError) from /vendor/rails/activesupport/lib/active_support/dependencies.rb:142:inload_without_new_constant_marking’
from
/vendor/rails/activesupport/lib/active_support/dependencies.rb:142:in
load_without_desert' from /vendor/rails/activesupport/lib/active_support/dependencies.rb:521:innew_constants_in’
from
/vendor/rails/activesupport/lib/active_support/dependencies.rb:142:in
load_without_desert' from /var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:18:inload’
from
/var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:32:in
__each_matching_file' from /var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:17:inload’
from /vendor/plugins/community_engine/config/boot.rb:5
from /home/utkarsh/Desktop/SJSU MS-SE/My
Dropbox/Dropbox/my-personal-documents/tech/ROR/knowledgebin/vendor/plugins/community_engine/config/boot.rb:4:in
each' from /vendor/plugins/community_engine/config/boot.rb:4 from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require’
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in require' from /vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inrequire_without_desert’
from
/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in
new_constants_in' from /vendor/rails/activesupport/lib/active_support/dependencies.rb:153:inrequire_without_desert’
from
/var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:8:in
require' from /var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:32:in__each_matching_file’
from
/var/lib/gems/1.8/gems/desert-0.5.3/lib/desert/ruby/object.rb:7:in
require' from /config/environment.rb:22 from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require’
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in require' from /vendor/rails/railties/lib/commands/generate.rb:1 from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require’
from /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require’
from ./generate:3

My installed gems are:

*** LOCAL GEMS ***

actionmailer (2.3.5, 2.3.4, 2.3.3)
actionpack (2.3.5, 2.3.4, 2.3.3)
activerecord (2.3.5, 2.3.4, 2.3.3)
activeresource (2.3.5, 2.3.4, 2.3.3)
activesupport (2.3.5, 2.3.4, 2.3.3)
appengine-apis (0.0.15)
appengine-jruby-jars (0.0.7)
appengine-rack (0.0.8)
appengine-sdk (1.3.3.1)
appengine-tools (0.0.12)
authlogic (2.1.3)
aws-s3 (0.6.2)
builder (2.1.2)
bundler08 (0.8.5)
calendar_date_select (1.16.1)
desert (0.5.3, 0.5.2)
google-appengine (0.0.12)
haml (2.0.5)
hpricot (0.8.2)
htmlentities (4.2.1)
icalendar (1.1.4)
jruby-rack (0.9.7)
mime-types (1.16)
progressbar (0.9.0)
rack (1.1.0, 1.0.1)
rails (2.3.4)
rake (0.8.7, 0.8.3)
ri_cal (0.8.7)
rmagick (2.13.1)
rubyzip (0.9.4)
searchlogic (2.4.19)
xml-simple (1.0.12)

and ruby -v: ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

Any ideas?

Similar problem is posted here:
http://groups.google.com/group/communityengine/browse_thread/thread/4f566f99284ee1db/f17bce1804973f14

But by upgrading Rails to 2.3.3 worked for him, I have downgraded from
2.3.5 to 2.3.4 and also tried on 2.3.3. But I get the same error.