Help with rflickr

I’m having trouble generating my flickr token I’m following the tutorial
on Max Dunn’s website when I enter:

f = MyFlickr.new

I get this error:

NameError: uninitialized constant MY_CONFIG
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:100:in
const_missing' from /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:131:inconst_missing’
from
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:in
const_missing' from script/../config/../config/../app/models/my_flickr.rb:6:ininitialize’
from (irb):4

Has anyone run into this problem? Does anyone know how to go about
fixing it?