Also, you can sidestep the whole admin/worldserver registration issue by the following settings:
|eqemu_config.xml|
<loginserver>
<host>127.0.0.1</host>
<port>5998</port>
<account></account>
<password></password>
</loginserver>
|login.ini|
unregistered_allowed = TRUE
This will bypass the registered server verification process and log your world server in as an unregistered 'Standard Server' instead of a 'Preferred Server.' You will receive an EQEMULoginServer [Database_Error], but it will not prevent your EQEmu server from logging into it.
I don't think deleting the account/password matters, but I tried it on mine and had no problem logging on. If this doesn't work, then something else is still wrong.