FiRe was trying to tell you that if you don't show us the code, we will not be able to help you! that's all! so chill out
as for the HTML, it wouldn't help a bit!
it would help to show "PHP" code (the one with mysql_query() and other php functions not HTML) that is doing the registeration process (register.php) and how does a user get credits to post ads (MySQL credits table(s))