The F1M Forums - forum.f1m.com - and F1M - www.f1m.com - are now completely seperate web sites. Logging into one will not log you into the other. If you cannot log into the F1M Forums, go to https://forum.f1m.com/app.php/user/forgot_password to change your password for that site only. Changing your password here will not affect your Forum account.
Also, I have disabled account creation on the F1M Forums for the moment while I work on bugs.