Can see on server list but goes back to Login after trying to connect.

[Vexyl]

AFAIK: If you don't compile EQEmu for 64-bit Windows then you will need the 32-bit version of the Perl and MySQL libraries.
The 32-bit version of EQEmu server will still be able to connect to a 64-bit version of the MySQL server, it just can't load 64-bit libraries.

Unless you are connecting to the database remotely then EQEmu should be connecting via localhost; you do not need to forward port 3306. If you mean "open" as in you can connect to it locally then that just means the MySQL server is running.