FPN registration woes

I recently bought a couple of Sailor fountain pens. As one of them was quite expensive, I was thinking of asking on the FPN forum on tips for first use, if any. As expected, the forum required a registration and I filled up the form (see below). However, after multiple tries the form gives the same error that I didn't write the answer to their spam protection question correctly!

FPN registration form error screen capture

As you can see on the screen shot above, all required fields are filled up and after multiple tries (with different answers to the question), the error still comes up!!

The spam protection feature seems to be preventing legitimate users to signup too. I wonder if FPN really want users to sign up to their forums.

It was hard to find a way to contact them too. Took me about 15minutes to find an email address: fpnadmin@gmail.com. Waiting to get a reply now.

If it matters, I'm using Iceweasel 24.0 browser on a Linux machine.