Fight Spamusers

I’ searching sth. like a Captcha-Tool to make the registration more secure against automatic spam-registrations.

I allready tried CapCC (http://fuctweb.com/2007/06/15/capcc/). But it does not work. I like “Did you pass math” (http://www.herod.net/dypm/) but it only “saves” comments.

I’m using a K2-Theme (http://dimension2k.de/). That should not be important because I use the traditional registration-window.

Anyone with ideas?

Thank’s for the hard work reading my creative english!
dabey