cannot install the current Rails on 3 machines

i follow the instructions on

http://rubyonrails.org/download

to install RoR, and on all 3 machines, they all cannot go past the front
page:

for example, when i click on

About your application’s environment

i get: (is it sqlite3 needed? is it mentioned in the set up page?)
thanks.

C:\proj\loop>ruby script/server
=> Booting WEBrick
=> Rails 2.3.2 application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2009-04-18 09:19:05] INFO WEBrick 1.3.1
[2009-04-18 09:19:05] INFO ruby 1.8.7 (2008-08-11) [i386-mswin32]
[2009-04-18 09:19:05] INFO WEBrick::HTTPServer#start: pid=3280
port=3000
/!\ FAILSAFE /!\ Sat Apr 18 09:19:17 -0700 2009
  Status: 500 Internal Server Error
  no such file to load -- sqlite3
    c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`gem_origina
l_require'
    c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in
`require'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/depend
encies.rb:156:in `require'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/depend
encies.rb:521:in `new_constants_in'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/depend
encies.rb:156:in `require'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_e
xt/kernel/requires.rb:7:in `require_library_or_gem'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_e
xt/kernel/reporting.rb:11:in `silence_warnings'
    c:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/core_e
xt/kernel/requires.rb:5:in `require_library_or_gem'
    c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connecti
on_adapters/sqlite3_adapter.rb:10:in `sqlite3_connection'
    c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connecti
on_adapters/abstract/connection_pool.rb:223:in `send'
    c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connecti
on_adapters/abstract/connection_pool.rb:223:in `new_connection'
    c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connecti
on_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection'

[...]

i follow the instructions on

http://rubyonrails.org/download

to install RoR, and on all 3 machines, they all cannot go past the front
page:

for example, when i click on

About your application’s environment

i get: (is it sqlite3 needed? is it mentioned in the set up page?)

It is if you want to use a sqlite3 database (in which case you need
the sqlite3-ruby gem and sqlite3 itself)

Fred

what are the options? mysql or sqlite3? i just wonder why there is no
mentioning of it onhttp://rubyonrails.org/download to talk about
having RoR run correctly? thanks.

mysql, sqlite3, sqlite or postgresql are common options, and there are
adapters for other one's too. I suppose it is assumed that it is
obvious that you will need the ruby bindings for the database you
pick.

Fred