Failing to use rake db

gistfile1.bash

$ rake db:reset --trace
rake aborted!
undefined method `task' for #<FiveTalk::Application:0xb77bd510>
/usr/local/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:215:in `initialize_tasks'
/usr/local/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:139:in `load_tasks'
/usr/local/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `send'
/usr/local/lib/ruby/gems/1.8/gems/railties-3.0.7/lib/rails/application.rb:77:in `method_missing'
/home/develop/0523a/fivetalk/Rakefile:7
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/rake_module.rb:25:in `load_rakefile'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:495:in `raw_load_rakefile'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:78:in `load_rakefile'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:77:in `load_rakefile'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:61:in `run'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:129:in `standard_exception_handling'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/lib/rake/application.rb:59:in `run'
/usr/local/lib/ruby/gems/1.8/gems/rake-0.9.0/bin/rake:31
/usr/local/bin/rake:19:in `load'
/usr/local/bin/rake:19