You probably reinstalled GCCG, and entered your old screen name. THen, the system randomly generated a password (like it always does) for your screen name, but when it tried to log in, it saw that said username was already registered (your old account), but had a different password associated with it. Send a personal message to Kralik requesting your password (give him your account's name), and when he answers you, copy the password and drop it into the "password" file under your .gccg folder. It should fix it.