Most likely, you are trying to use the same log in with the same user name and password for either account. Both the website and forum accounts require different log in credentials.
To log on to the forum, you will need to send an email request for an account to be created.
If you've purchased a license, your account on our website has already been created; you just need to activate it. You can do this by requesting to have your password reset:
Click the Login button at the bottom of the page. Click, Request new password. Enter the email address associated with your license. You'll be sent an email with an activation link. Follow the activation link to reset the password. Log in with your new password.