MyBB Community Forums

I created mybb when i had metulburr.com pointed to the server and created mybb. However, we need to change the domain name, and is now python-gaming.com. All works except i cannot log into mybb when using the domain python-gaming.com. It will successfully log me in, but as soon as i enter the forums it shows me as guest. This does not happen when using the domain metulburr.com 

How can i fix this to use the new domain?

You will have to log in to phpmyadmin and change cookiedomain to .python-gaming.com
You will also have to change bburl to http://python-gaming.com/YOUR-FORUMS-PATH but you should be able to do that after logging in.
Delete inc/settings.php (and invalidate ZendOpCache or APCache if you have it enabled, most likely not but its a possibility if you still can't log in after making these changes)