yes certainly, I activated Recaptcha plugin in the configuration and the modules. But the problem continued to exist. so I did the same and K2 options. I did this to make it work ...
I have seen has changed Recaptcha method!!!
After I did that . was presented another issue like "Jquery unable to load .......... k2.js" when you submit the form. To solve this I had to esclude by the configuration of the template, in the esclude js, I put k2.js. ...
now everything ok.
what made it difficult, is to create groups and permissions to users, etc. but also this was solved.
Now i look at how for creating a carousel for the registered users at blog with information that will sourced....another unsolved issue..
any advice will be helpful..
thank you...