Problema con restful_authentication

hola a todos, tengo un problma cuando intento usar este plugin, lo
instalo y parece instalarse perfecto, creo generate authenticated user
account, corre bien pero al intentar hacer la migracion me aparece el
siguiente error:

** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
no such file to load – faker

C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in
gem_original_require' C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:inrequire’
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in
require' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:innew_constants_in’
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in
require' C:/ruby_proj/erMono2/config/initializers/machinist.rb:3 C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:inload_without_new_constant_marking’
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in
load' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:innew_constants_in’
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in
load' C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:622:inload_application_initializers’
C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:621:in
each' C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:621:inload_application_initializers’
C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:176:in
process' C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:insend’
C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in
run' C:/ruby_proj/erMono2/config/environment.rb:9 C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:ingem_original_require’
C:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in
require' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:inrequire’
C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in
new_constants_in' C:/ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:inrequire’
C:/ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/misc.rake:4
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in call' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:inexecute’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in each' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:inexecute’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in
invoke_with_call_chain' C:/ruby/lib/ruby/1.8/monitor.rb:242:insynchronize’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
invoke_with_call_chain' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:ininvoke_prerequisites’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in each' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:ininvoke_prerequisites’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in
invoke_with_call_chain' C:/ruby/lib/ruby/1.8/monitor.rb:242:insynchronize’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in
invoke_with_call_chain' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:ininvoke’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in
invoke_task' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in each' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in
standard_exception_handling' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:intop_level’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in run' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling’
C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in run' C:/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 C:\ruby\bin/rake:16:inload’
C:\ruby\bin/rake:16
-e:1:in `load’
-e:1

no es una gema pero igual intente agregarla a mi enviroment usando
config.gem “aut…” y luego rake gems install…pero el problema
persiste…ya no se que hacer…por favor ayudenme…gracias.