Are you sure you are using the correct user login/username?
To make sure this is not what is stopping you from logging in, it could be a good idea to start with resetting your user login as well.
To do this, click on the Forgot Login link on the login page.
On the next page, enter your email address, check the box to confirm you are not a robot and an email to reset your login will be sent to you.
After resetting your login name, if have not done so already, you will want to redo the process of creating a new password again.