Forum Spam problem with forum version 4.0.1
 

After i upgraded my forum from version 3.8.4 to 4.0.1, the forum is receiving loads of spam posts. I configurated it so that people can oly post after being registered, and to register a new account there is a verification code required and a confirmation that is sent to the persons e-mail address. And even with that registration proccess the forum is still getting lots of spam posts per day.

Any idea why is that happening??

How can i stop that, since on my previous version it didnt happen??

This spams, says: "Viagra... or porn spams"