product price and availability not showing up

I configured the rich snippet for product but in the testing tool just the review is showing up.
I use another plugin for authorship but even if i deactivate that the result is the same.

Please help

Here is an example

http://smokealarms.me.uk/combination-smoke-and-carbon-monoxide-alarm-with-voice-alert-kidde-900-0122-uk/

http://wordpress.org/plugins/all-in-one-schemaorg-rich-snippets/