Try registering again using a different username AND a different email address. Use a gmail.com or yahoo.com (or similar) address, if you have one. Then check that account for an email containing a link to set your password and complete your registration. Click here to register now.

If you didn't receive an email to set your password, try using the registration form here. This form includes fields to setup your password and complete your registration in one step. Note - you will likely need to input a username and email address that you have not utilized for previous attempts.