If I understand EoC correctly, it connects to your database server and reads/writes to an EQEmu database over a network device. With that in mind, the only way anyone can help is for you to provide additional information.
How are you using EoC? Are you using it remotely (e.g., connecting from http://eoc.akkadius.com/EOC2/login.php
) or locally (e.g., downloading the EoC source and running it remotely, so it connects over LAN/localhost)?
Along with the above information, please also provide the host (IP address) and port that you've set EoC to connect to (if you'd rather not, simply make sure it's your external IP address if it's a remote connection, internal (LAN) IP address if over LAN, and localhost if on the same computer). If connecting remotely, forwarding the port on your router will be necessary. Remotely or not, check your firewall and make sure the port is allowed to have incoming traffic.
I assume the database credentials you're using are correct as you set that up yourself (do not post this information as that would be a huge security risk).
After that, kindly allow some time before posting again since everyone here has other things in life that must take priority over EQEmu support.
If I'm way off on understanding the situation feel free to say so.