Odbc-rails gem installation problem

Hello…

I install the odbc-rails gem by running:

gem install -r odbc-rails --include-dependencies

Then I add require ‘odbc_adapter’ to my config/environment.rb

When I start the server I get this beauty…

C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/active_record/
connection_adapters/abstract/connection_specification.rb:34:
uninitialized class variable @@allow_concurrency in ActiveRecord::Base
(NameError)

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `gem_original_require’

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `require’

    from C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/

active_support/dependencies.rb:495:in `require’

    from C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/

active_support/dependencies.rb:342:in `new_constants_in’

    from C:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.4/lib/

active_support/dependencies.rb:495:in `require’

    from C:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.5/lib/

active_record/connection_adapters/abstract_adapter.rb:10

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `gem_original_require’

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `require’

     ... 27 levels...

    from C:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.5/lib/commands/

server.rb:39

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `gem_original_require’

    from C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:

27:in `require’

    from script/server:3

Appreciate anyones help.

Thanks,

GPB