Wheels challenge and my DQ:ed image... but why?

http://www.dpreview.com/challenges/Challenge.aspx?ID=7136

My image of the Falkirk Wheel was DQ:ed by the host saying:

"Sorry but these are not wheels, thus your entry does not abide by the challenge theme and I have to disqualify it. "

I wish the host, vqueen, would have done some research before DQ:ing the image. Falkirk Wheel is indeed a wheel and is actually very well known for the engieering masterpiece of using the Archimedes principle (To the host: if you don't know what the Archimedes principle is please google).

https://www.google.se/search?q=falkirk+wheel&hl=sv&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=6mspUPyAHenj4QScsoGIBQ&sqi=2&ved=0CF0QsAQ&biw=1420&bih=921

In other words, just another lazy host not doing his/her job properly, or unable to set up the rules properly or...

...lacking phantasy to see wheels in the above image.

If the Falkirk Wheel is not a wheel than I really don't know what a wheel is.