First of all, use this tutorial instead:
http://www.everquestserver.com/forum...pic.php?t=9648
The one you linked is outdated.
Second, prove to yourself that you have the correct username/password. Open up a DOS prompt and navigate to the mysql/bin folder. From there, run this syntax:
Code:
mysql -u MyUserName -p MyDatabase
It will then ask you for the password. If you get in, your username/password is valid. If not, you need to get it right. Use the tutorial up above for more information on how to do it.