From edge to stable version

Hi, I was developing an app with Edge-Rails. When 1.2.1 version
arrived I removed the rails directory within vendor and application
doesn't work anymore.

Alse I made a gem cleanup and I got this error running webRick server:

/usr/lib/site_ruby/1.8/rubygems.rb:204:in `report_activate_error':
RubyGem version error: activesupport(1.4.1 not = 1.4.0)
        from /usr/lib/site_ruby/1.8/rubygems.rb:141:in `activate'
        from /usr/lib/site_ruby/1.8/rubygems.rb:167:in `activate'
        from /usr/lib/site_ruby/1.8/rubygems.rb:166:in `each'
        from /usr/lib/site_ruby/1.8/rubygems.rb:166:in `activate'
        from /usr/lib/site_ruby/1.8/rubygems.rb:37:in
        from /usr/lib/site_ruby/1.8/rubygems.rb:31:in `require_gem'
        from ./script/../config/boot.rb:28
        from script/server:2:in `require'
        from script/server:2

Why It looks for activesupport 1.4.0 when It's installed 1.4.1?