undefined local variable or method `config' for Synthesis::AssetPackag

[localguiding]

Hi,
I'm getting this error when I try to run my app. Any suggestion ?

=> Booting WEBrick
=> Rails 2.3.5 application starting on http://0.0.0.0:3000
/var/lib/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be removed on or after August 2010. Use #requirement
/var/lib/gems/1.8/gems/asset_packager-0.2.0/lib/synthesis/asset_package.rb:6: undefined local variable or method `config' for Synthesis::AssetPackage:Class (NameError)

Thanks in advance