Rails Ruby on Rails

I try set migration on my database and i got this:

rake db:migrate --trace
(in /home/lite/AIP)
DEPRECATION WARNING: railtie_name is deprecated and has no effect. (called from <class:Railtie> at /home/lite/.rvm/gems/ruby-head@rails300/gems/will_paginate-3.0.pre/lib/will_paginate/railtie.rb:6)
rake aborted!
can not load translations from /home/lite/.rvm/gems/ruby-head@rails300/gems/activesupport-3.0.0.beta4/lib/active_support/locale/en.yml, the file type yml is not known
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/base.rb:213:in `load_file'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/base.rb:21:in `block in load_translations'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/base.rb:21:in `each'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/base.rb:21:in `load_translations'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/simple.rb:57:in `init_translations'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/simple.rb:71:in `lookup'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n/backend/base.rb:34:in `translate'
/home/lite/.rvm/gems/ruby-head@rails300/gems/i18n-0.4.1/lib/i18n.rb:152:in `translate'
/home/lite/.rvm/gems/ruby-head@rails300/gems/activesupport-3.0.0.beta4/lib/active_support/core_ext/array/conversions.rb:13:in `to_sentence'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/plugin.rb:50:in `load_deprecated_tasks'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/plugin.rb:44:in `load_tasks'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/application.rb:125:in `block in load_tasks'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/application/railties.rb:11:in `each'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/application/railties.rb:11:in `all'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/application.rb:125:in `load_tasks'
/home/lite/.rvm/gems/ruby-head@rails300/gems/railties-3.0.0.beta4/lib/rails/application.rb:81:in `method_missing'
/home/lite/AIP/Rakefile:7:in `<top (required)>'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2383:in `load'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2383:in `raw_load_rakefile'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2017:in `block in load_rakefile'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2016:in `load_rakefile'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2000:in `block in run'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/home/lite/.rvm/gems/ruby-head@rails300/gems/rake-0.8.7/bin/rake:31:in `<top (required)>'
/home/lite/.rvm/gems/ruby-head@rails300/bin/rake:19:in `load'
/home/lite/.rvm/gems/ruby-head@rails300/bin/rake:19:in `<main>'

In /home/lite/.rvm/gems/ruby-head@rails300/gems/activesupport-3.0.0.beta4/lib/active_support/locale/en.yml I have

en:
  date:
    formats:
      # Use the strftime parameters for formats.
      # When no format has been given, it uses default.
      # You can provide other formats here if you like!
      default: "%Y-%m-%d"
      short: "%b %d"
      long: "%B %d, %Y"
      
    day_names: [Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday]
    abbr_day_names: [Sun, Mon, Tue, Wed, Thu, Fri, Sat]
      
    # Don't forget the nil at the beginning; there's no such thing as a 0th month
    month_names: [~, January, February, March, April, May, June, July, August, September, October, November, December]
    abbr_month_names: [~, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec]
    # Used in date_select and datime_select.
    order:
      - :year
      - :month
      - :day

  time:
    formats:
      default: "%a, %d %b %Y %H:%M:%S %z"
      short: "%d %b %H:%M"
      long: "%B %d, %Y %H:%M"
    am: "am"
    pm: "pm"
      
# Used in array.to_sentence.
  support:
    array:
      words_connector: ", "
      two_words_connector: " and "
      last_word_connector: ", and "

And my gem list

abstract (1.0.0)
actionmailer (3.0.0.beta4, 2.3.4)
actionpack (3.0.0.beta4, 2.3.4)
activemodel (3.0.0.beta4)
activerecord (3.0.0.beta4, 2.3.8, 2.3.4)
activeresource (3.0.0.beta4, 2.3.4)
activesupport (3.0.0.beta4, 2.3.8, 2.3.4)
acts-as-taggable-on (2.0.6)
arel (0.4.0)
bcrypt-ruby (2.1.2)
builder (2.1.2)
bundler (0.9.26)
capybara (0.3.9)
compass (0.10.2)
configuration (1.1.0)
cucumber (0.8.5)
cucumber-rails (0.3.2)
culerity (0.2.10)
database_cleaner (0.5.2)
devise (1.1.rc2)
diff-lcs (1.1.2)
erubis (2.6.6)
factory_girl (1.3.1)
factory_girl_rails (1.0)
ffi (0.6.3)
friendly_id (3.0.6)
gherkin (2.1.4)
haml (3.0.13)
i18n (0.4.1)
jrails (0.6.0)
json_pure (1.4.3)
launchy (0.3.5)
mail (2.2.5)
mime-types (1.16)
mysql (2.8.1)
nokogiri (1.4.2)
paperclip (2.3.3)
polyglot (0.3.1)
rack (1.1.0, 1.0.1)
rack-mount (0.6.9)
rack-test (0.5.4)
rails (3.0.0.beta4, 2.3.4)
railties (3.0.0.beta4)
rake (0.8.7)
rdoc (2.5.9, 2.5.8)
rspec (2.0.0.beta.17)
rspec-core (2.0.0.beta.17)
rspec-expectations (2.0.0.beta.17)
rspec-mocks (2.0.0.beta.17)
rspec-rails (2.0.0.beta.17)
selenium-webdriver (0.0.24)
spork (0.8.4)
sqlite3-ruby (1.3.1, 1.3.0)
term-ansicolor (1.0.5)
thor (0.13.7)
treetop (1.4.8)
trollop (1.16.2)
tzinfo (0.3.22)
warden (0.10.7)
webrat (0.7.1)
will_paginate (3.0.pre)

I found similar problem, but not solved: http://groups.google.com/group/rubyonrails-talk/browse_thread/threa...