If WPDollar v2.0 is not creating the post, please double check your Amazon API Key.
Your amazon keys are possibly invalid.
Amazon returns this for your keys:
Your AccessKey Id is not registered for Product Advertising API. Please use the AccessKey Id obtained after registering at https://affiliate-program.amazon.com/gp/flex/advertising/api/sign-in.html.
You need to follow the link and login to validate the key.