If you read the Wiki that AndMetal and I wrote for Debian Linux Servers, you will see a section called "Adding MySQL Account for Remote Administration". I think that should explain exactly what you need to do even for Windows.
http://www.eqemulator.net/wiki/wikka...LRemoteAccount
If you are running a Windows server, you may also need to go through the configuration wizard for MySQL again and make sure you selected to enable remote access to it.
If you aren't trying to access the server from another PC, then you can just ignore this, because you have some other issue lol.