uninitialized constant Rake::DSL

Hello,
So I was restless over the weekend and I decided to install the entire ruby/rails environment on my computer. I followed the process at the link below but I got stuck on the "verify heroku is setup" step. Here's the output from the command prompt. Can you help? I was super excited that I got that far. Basically, it seems like I created a database but I can't migrate it to the test app I created. I'm wondering if it had anything to do with the fact that I had heroku on here before I started downloading all the other stuff. I tried to revert my rake to 0.8.7 but that didnt help either. Let me know your thoughts.

http://www.wiki.devchix.com/index.php?title=WindowsInstaller-Rails_3

# Rails Environment Configuration.

---
git:
  user.name:  Danielle Banks
  user.email: [email blocked]
  version:    git version 1.7.3.1.msysgit.0

ruby:
  bin:        C:/RailsInstaller/Ruby1.8.7/bin/ruby.exe
  version:    ruby 1.8.7 (2011-02-18 patchlevel 334) [i386-mingw32]

rails:
  bin:        C:/RailsInstaller/Ruby1.8.7/bin/rails.bat
  version:    Rails 3.0.7

ssh:
  public_key_location: C:\Documents and Settings\banksd/.ssh/id_rsa.pub
  public_key_contents: ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyH++AOLfm+JgOMYPIG8YR
TCwIvMCxluM4DW7WG13eCm89rhNxqt0Y9JSnw4L+mF77FbFFutQSc8Lka3sTT1UTCDq0t9T0fvbqLEAD
RNeUn7T896EMSEmkqyIQZ//BtxNrNU2tCugGXPp47gHBGqIJ+oElqiUwmrOt9LljFk5OglFTzsYcubJv
29lhlXv9oa5P6vbE5nuZ7qpvPfkrJdt7tU9SWPESYPxlhZw2PTVe0s2SdYoU7pN4akIV+/JY9RBYIZmg
PDKtywsQh0YSZLUSMleWZN4pDtRujrm74CMeXcRpvxgujlLH2/VVo9AnWL0OIVJtr9n2H0/kuSulH4HW
Q== Danielle Banks 




C:\Sites>cd test_app

C:\Sites\test_app>rails server
=> Booting WEBrick
=> Rails 3.0.7 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2011-07-05 13:05:55] INFO  WEBrick 1.3.1
[2011-07-05 13:05:55] INFO  ruby 1.8.7 (2011-02-18) [i386-mingw32]
[2011-07-05 13:05:55] INFO  WEBrick::HTTPServer#start: pid=3404 port=3000


Started GET "/users" for 127.0.0.1 at Tue Jul 05 13:08:23 -0400 2011
  Processing by UsersController#index as HTML
  User Load (31.2ms)  SELECT "users".* FROM "users"
Rendered users/index.html.erb within layouts/application (46.9ms)
Completed 200 OK in 312ms (Views: 93.7ms | ActiveRecord: 31.2ms)
[2011-07-05 13:08:34] INFO  going to shutdown ...
[2011-07-05 13:08:34] INFO  WEBrick::HTTPServer#start done.
Exiting
Terminate batch job (Y/N)? y

C:\Sites\test_app>heroku create
Creating young-meadow-966... done, stack is bamboo-mri-1.9.2
http://young-meadow-966.heroku.com/ | git@heroku.com:young-meadow-966.git

C:\Sites\test_app>git remote show
heroku

C:\Sites\test_app>git push heroku master
Warning: Permanently added the RSA host key for IP address '50.19.85.156' to the
 list of known hosts.
Everything up-to-date

C:\Sites\test_app>heroku rake db:migrate
(in /app)
rake aborted!
uninitialized constant Rake::DSL
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:8:in `'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:6:in `'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/tasklib.rb:3:in `'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/rdoctask.rb:20:in `require
'
/app/.bundle/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/rdoctask.rb:20:in `'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks/documentation.r
ake:1:in `require'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks/documentation.r
ake:1:in `'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:15:in `load'

/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:15:in `block
 in '
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:6:in `each'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/tasks.rb:6:in `'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:214:in
 `require'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:214:in
 `initialize_tasks'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:139:in
 `load_tasks'
/app/.bundle/gems/ruby/1.9.1/gems/railties-3.0.7/lib/rails/application.rb:77:in
`method_missing'
/app/Rakefile:7:in `'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2373:in `load'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
/usr/ruby1.9.2/lib/ruby/1.9.1/rake.rb:1991:in `run'
/usr/ruby1.9.2/bin/rake:31:in `'

C:\Sites\test_app>