Keep getting INVALID CODE when trying to sign up for stress test!

buckeye

 I have been trying to sign up for the stress test over at Fileplanet, but keep getting the "Invalid Code" message in the image box where one should be getting a random code to type into the clear box below. I am using IE and I have turned off my firewall, AV and pop up blocker but still get the message. Are there still keys left? If so, what else do I need to do to get past this screen???