It seems that  the robomanager doesn't handle http 302 redirects correctly.

See http://www.internetofficer.com/seo/302-redirect/ for explanation of 304 errors.

Example:When you load a page http://www.page.com?action=list&country=US a redirect is made to http://www.page.com/countries/#c=123&lst=US .Robomaker doesn't follow this redirect so there are no results for the query.