I think you got kicked because somebody already has chosen that name,
try to pick another nickname and see if it works.otherwise, i suggest you join IRC chat and talk to an admin (click on chat in the left upper corner of your screen)
they can always check what is wrong and see if the name is already used
if another name doesnt work, it might be that you bought a banned game key.
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btw, i see you are a new player to cRPG, welcome!
if you click on the first link in my signature, you are directed to a 'clan' in the game that acts as a support organisation for new players. There were some discussions lately and we found that the game is too hard for new players (older players have way better gear) so we started this clan.
New players get advice from several trainers (experienced players) that all have excelled in one of the games classes. You can also get free gear from our armoury so you dont have to buy it yourself (wich is the main loss of money during your first generation)
link to our clan thread:
http://forum.meleegaming.com/faction-halls/newbies-clan/click on the link under the banner if you want to join