Well html5 requires an App ID and is much more powerfull taking full advantage of the Facebook Open Graph.
The plugin version is displayed in your extension manager, but I can say for sure you don't have the latest so you should update getting the last one from the product page (being logged in)
- Need help? Post the URL of the related page (eventualy as confidential info), it will help solve your issue faster.
- An error, notice or warning? report the exact message including the line number
- If you get a white page , enable error reporting and / or check your server error logs.