I did have a look at this, and I thought that the captcha was practically unreadable. It seemed to have a character which looked like an underscore, but might have been a 1 on its side. Have you tried the option to have it play the captcha to you? The other thing I found was that the two questions at the end were complete mysteries to me, presumably relating to some TV programmes or films which I've never heard of.
PS I've just had another look at it, and the captcha is now readable, and the questions at the end are ones I can answer, so it might be worth going back and trying again (if you haven't already).