Nobody can register

I have this new site: http://www.pracaitirlandia.pl, I had steady flow 1-2 registrations per day since my adwords campaign has started 2 weeks ago.

I had no registration for last 2 days – since wangguard installation.
Today I checked it and I can’t register with any of my legitimate emails (tested 3) – I’m getting “ERROR: Banned by WangGuard Is a mistake?.”

I can see in wangguard stats there was 6 registration attempts which is a little tragedy for me, considering that might be legitimate users that will never return 🙁
Currently it’s turned off.

http://wordpress.org/plugins/wangguard/