I have uploaded a bit over 30,000 items to google base. They are published and searchable, the dashboard displays 10,000 items (10 items on 1000 pages).

I see some items have impr (impressions) and clicks... but I cannot sort these columns.

I need to know which items had clicks and sort the results by number of clicks or impressions. I have tried using the gm:clicks and gm:impr namespace attributes in the Google Base API... but I keep getting errors that clicks or gm:clicks are not valid attibutes.

How can I perform this query?

Google base has all the information I need already, how can I display it by clicks?