[1] pry(main)> require 'bing-ads-api'
NoMethodError: undefined method `camelize' for "budget_limit_type":String
from /opt/boxen/rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/bing-ads-api-0.3/lib/bing-ads-api/constants.rb:55:in `block in <module:BingAdsApi>'
any clues on how to fix this?