syntax error, unexpected ':', expecting $end

Question

I am attempting to get this going: http://github.com/xaviershay/db2s3

I created a file in config/initializers/db2s3.rb

     DB2S3::Config.instance_eval do
       S3 = {
       :access_key_id     => 'id',
       :secret_access_key => 'key',
       :bucket            => 'name'
    }
  end

In the rake file I added:

require 'db2s3/tasks'

But when I attempt to run the rake task to push it into s3 I get an error. rake db2s3:backup:full

...../config/initializers/db2s3.rb:13: syntax error, unexpected ':', expecting $end