uninitialized constant ActiveRecord::VERSION

rubyonrails-talk
1

I can´t create my data base with rake db:create

erro:

rake aborted!

uninitialized constant ActiveRecord::VERSION

-gem list

actionmailer (2.2.2)

actionpack (2.2.2)

activerecord (2.2.2)

ActiveRecord-JDBC (0.5)

activerecord-jdbc-adapter (0.9.1)

activeresource (2.2.2)

activesupport (2.2.2)

jruby-openssl (0.5.1)

rails (2.2.2)

rake (0.8.7)

rspec (1.2.6)

sources (0.0.1)

I forget something?