EQEMu Loginservers:
You need to create the account/password yourself. 
Here: 
http://www.cyberjunky.net/signup/ 
Suggestion to use:
Here: 
http://eqw.eqhackers.com/ 
Then you need to get the eqhost. 
Here: 
http://www.eqemu.net/eqhost.txt 
(Right Click Save As and save into your EQ folder) 
(When you patch it overwrites it so you'll need to make a backup of it if you want to patch) 
Minilogin:
When entering it automatically creates the account.
If it's a minilogin problem, i'm willing to bet your didn't change the eqhost.