saying if i replace the three recaptch files with updated ones it might work ?

forum.joomla.org/viewtopic.php?f=615&t=832820

Not three. There is only one file that needs to be changed. That one is the recaptcha.php file.

didnt work ...cleaned cache tried different computer , browsers.....

Could you provide a link to your comments page in order to check it out.

campruffruff.com/index.php/en/blog/item/128-training-our-dogs-to-make-the-right-decisions-even-when-there-over-aroused-and-in-a-limbic-reactive-state

Try to enable repatcha both in your comments and the plugin and let me know so I can check again in your page.

done .....

Did you update the recaptcha.php file with the one provided in the 2.5.17 joomla version?
Also, did you update your K2 with the latest version?

took the file from here
forum.joomla.org/viewtopic.php?f=615&t=832820

didn't update K2 not an option in admin area backend......have to find info on that :( "newbie"

The path to the google recaptcha in the file is still the old one. Check if the file I have attached is the same with your own in plugins/captcha/recapthca/recaptcha.php