Hummingbird does not scan

I have installed Hummingbird, but when I try to run a scan I get an error message telling me "The performance test didn't return any results." I checked with my hosting company and Hummingbird is NOT on their list of restricted plugins and they say it should work. They do have other reports of this in their knowledge base. Please resolve this matter so I can use the plugin. Follow this link to get all server setup info... http://mosquitoes.wpengine.com/phpinfo.php