I just tried to reinstall my Mybb Forum I get error SQL Error:1045 - Access denied for user 'sexybabe Query:[READ] Unable to connect to MySQL serverSo how do I fix this hit me up on AIM DJboutit5 or Yahoo DJboutit12000 to talk more about this
Check that when you are installing you are using correct credentials. Remember, your database name and your username are different things with different passwords, you've probably got them mixed up. I did it a lot when I first started out with forum softwares. Easy to fix and nothing to worry about.
Have you considered asking MyBB support? Looking at your error though, it looks like your configuration is wrong. Check your config.php again to be sure the database connection settings are in fact correct. Also, look here. http://wiki.mybb.com/index.php/Help:Common_Error_Messages#SQL_Errors