Note that it takes time to re-index your website for search engines. The changes in the search results (not rich snippet testing tool) might show after few days. However, in my opinion the main reason why it doesn't show up in the search results is that Google search engine doesn't support that type of content.
Google Search Engine Supports:
- Reviews
- People
- Products
- Businesses and organizations
- Recipes
- Events
- Music
- Applications
- Video
- Breadcrumbs
You can read more about these content types and what type of content Google search engine supports at here -http://blog.victorlava.com/what-is-a-rich-snippet-everything/