Error in following Radiant CMS installation

my steps:

  1. installed ruby include gem manager, and downloaded rails and radiant
    gem packages.
  2. gem install rails
  3. gem install radiant
  4. i have seen in 1.8/gems folder, there are rails and radiant
    directories
  5. use sqliteman to create a database named ‘radiant_live.db’[size is
    0kb]
  6. put this db file into
    ‘C:\Ruby\lib\ruby\gems\1.8\gems\radiant-0.8.0\db’ folder
  7. modified database.yml file like this
    production:
    adapter: sqlite3
    database: db/radiant_live.db
  8. then following the doc in rdoc website with commands
    rake production db:bootstrap
  9. error popup as attachment shown, which is about sqlite3

anybody can help me? thanks.

~aLeX ChOu