Errors during migration

I am getting the following error when attempting to rake migrate. This
is happening both on windows and linux using mysql 4.x

Can anybody tell me why I would get a “uninitialized constant WEBrick”
errors.

D:\Source\trunk\borg\test_callflow>rake migrate --trace
(in D:/Source/trunk/borg/test_callflow)
** Invoke migrate (first_time)
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
uninitialized constant WEBrick
d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependenci
es.rb:123:in const_missing' d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependenci es.rb:131:inconst_missing’
D:/Source/trunk/borg/test_callflow/config/…/config/environment.rb:56
d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in
require__' d:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:inrequire’
d:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependenci
es.rb:147:in require' d:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/tasks/misc.rake:3 d:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.2/lib/tasks/misc.rake:2:incall’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in execute' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in execute' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:357:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in
synchronize' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:364:in
invoke_prerequisit es' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:363:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:in send' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:363:in
invoke_prerequisit es' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:356:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in
synchronize' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:364:in
invoke_prerequisit es' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:363:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:in send' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:999:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:363:in
invoke_prerequisit es' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:356:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in
synchronize' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:ininvoke’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in run' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:ineach’
d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in run' d:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.1/bin/rake:7 d:/ruby/bin/rake:18:inload’
d:/ruby/bin/rake:18