Forum: Radiant CMS 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