Hi David,
Initially, your username and password for your member panel and for the forums are the same. However, if you change the password for your member panel, it will not change the password for your forum. When you've been using the "Lost password" option, have you done that on the forum sign in or on the member panel sign in? If you changed it on the forum, you have received an email with a new password.
Let me know if you have any other questions.
Thanks,
Elise

