All in one SEO does not seem to be adding meta data - Tested a number of templates but this is not t

Hello there,

I have installed the 'All in One SEO' plugin from here but none of my pages seem to have metadata in the pages.

The title field is blank and there is no meta description or keywords.

The meta name shows as below.
<meta name="generator" content="WordPress 3.0.1" />

Would I be better removing this plugin and installing this on a site by site basis.