[Plugin: Google Analytics for WordPress] Site search statistics not working

Thanks for a great plugin. Everything is working very well except that site searches are not being counted. The plugin has been running for a few months and I know there have been some site searches done.

I have checked, and re-checked the site search set up in GA and I am sure I have got the settings right.

Any ideas what the problem could be?

Thanks

http://wordpress.org/extend/plugins/google-analytics-for-wordpress/