Rails - Oct 2010 - Error when starting WEBrick with script/server command

Hi!
I am new with Ruby on Rails and very interested with the language. I am
trying to
follow an example from a book but when I run the "script/server"
command
I have got the following error message:
=> Booting WEBrick
=> Rails 2.3.4 application starting on http://0.0.0.0:3000
C:/Ruby192/lib/ruby/1.9.1/syck.rb:135:in `load'': syntax error on line
20, col -1: `'' (ArgumentError)
  from C:/Ruby192/lib/ruby/1.9.1/syck.rb:135:in `load''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rails-2.3.4/lib/initializer.rb:902:in
`database_configuration''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rails-2.3.4/lib/initializer.rb:437:in
`initialize_database''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rails-2.3.4/lib/initializer.rb:141:in
`process''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rails-2.3.4/lib/initializer.rb:113:in
`run''
  from C:/Users/patriciac/My Documents/Aptana RadRails
Workspace/emporium/config/environment.rb:9:in `<top (required)>''
  from <internal:lib/rubygems/custom_require>:29:in `require''
  from <internal:lib/rubygems/custom_require>:29:in `require''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
`block in require''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:521:in
`new_constants_in''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:156:in
`require''
  from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rails-2.3.4/lib/commands/server.rb:84:in
`<top (required)>''
  from <internal:lib/rubygems/custom_require>:29:in `require''
  from <internal:lib/rubygems/custom_require>:29:in `require''
  from script/server:3:in `<main>''

Could someone tell me what is wrong here? I have followed all the steps
the book mentions but it seems like there is something wrong with the
example code because it doesn''t work. I will appreciate a lot the help
from yours.
I am using Aptana Radrails Studio to code the application.
Thanks!
Regards,
Patricia

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