Rake doesn't know how to build 'db_schema_dump'

Alright, I'm a complete newbie at rails. I have over 4 years experience
and php and figured I would try my hand at rails. So I'm following the
'Migration tutorial' from the RoR homepage. I'm trying to build a
Sqlite3 database using the Sqlite3 gem.

Database.yml:

development:
  adapter: sqlite3
  database: db/development.sqlite3
  timeout: 5000

test:
  adapter: sqlite3
  database: db/test.sqlite3
  timeout: 5000

production:
  development

Outputs

C:\ruby\blog\db>rake db_schema_dump
(in C:/ruby/blog)
rake aborted!
Don't know how to build task 'db_schema_dump'

(See full trace by running task with --trace)

C:\ruby\blog\db>rake db_schema_dump --trace
(in C:/ruby/blog)
rake aborted!
Don't know how to build task 'db_schema_dump'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1472:in `[]'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in
`top_level'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in `each'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1739:in
`top_level'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in
`standard_exceptio
n_handling'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1733:in
`top_level'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1711:in `run'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1761:in
`standard_exceptio
n_handling'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/lib/rake.rb:1708:in `run'
c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.3/bin/rake:7
c:/ruby/bin/rake:16:in `load'
c:/ruby/bin/rake:16

Any help is greatly appreciated.

C:\ruby\blog\db>rake db_schema_dump
(in C:/ruby/blog)
rake aborted!
Don't know how to build task 'db_schema_dump'

Rake tasks can now have namespaces and rails uses them. It looks like
the tutorial assumes a prior version of rails before rake namespaces
existed. You probably need:

rake db:schema:dump

You can get a full list of rake tasks available, but running:

rake -T

Hope that helps,
Jordan