First, have you activated your account? You should have received an email within 3 days of registering with a link to activate your account. If it has not been 3 days since you registered, keep watch for your activation email. If three days have passed, email the admin from the email account you used to register at admin@thedishforum.com.
If you know your account is activated, but you still can't log in, check your browser to make sure it will accept cookies from SoapSaver. Also, make sure your browser is set to allow sessions. If this still does not fix the problem, contact the admin from the email account you used to register with an explanation of your problem.