Can anybody help me in activating recaptcha

Hi, I am using Question2Answer(Q2A) open source platform for PHP/MySQL. I am trying to activate the reCaptcha plugin on my site. I have already got the Public and Pricate key for my domain, but I am not able to follow the next steps of adding code on the Q2A pages mentioned in the following link , https://developers.google.com/recaptcha/docs/php?csw=1 I am new to PHP, Can anybody help me with this issue. Regards, Sneha -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://groups.google.com/group/recaptcha. For more options, visit https://groups.google.com/groups/opt_out.