If you're having trouble registering on the site, most likely the confirmation e-mail is getting caught in your spam catcher. Then, when you e-mail for help, that reply gets caught too.

If you have an issue with retrieving your password, we cannot send it to you. The only way for you to get it is to do the "forgot password" thing at the failed login- and there's the possibility that will get caught in your spam catcher when your password is e-mailed to you.

We also cannot change your password. You have to do it when you're logged onto the site, via the User Control Panel.