Several attempts at trying to test a site, still no response

I've been trying to test https://seap.asee.org/award to see if it is susceptible. The website doesn't seem to be working however. Each time I hit go, the progress bar at the top of the screen slowly creeps to the right for a few minutes before simply stopping when it's almost done. I'll wait 5 or so minutes with no result before trying again. It's not showing any errors however, it just isn't completing the task. I tried doing it on google.com, same thing. Tried the test positive (ec2-54-81-196-192.compute-1.amazonaws.com:4433) same thing.
I'm using a school computer with Internet Explorer 9.0.8112.16421. Thanks!