How to join login form with activation with captcha code

how can i join the login form with activation with the captcha code..

the one i tried is in loginTried folder but its not working..

the first button is supposed to check the captcha code if its right theres another button which will register the user in databse and send an email activation.. but its not working.. because the second button  will recheck the captcha code but thats not what its suppose to do..

please correct me

thanks