Yes... Now I know where the problem is. But I changed my nickname only each 12 Seconds...
But probably i restarted MSN to often, and so it changed it more then 10 times / min...
But, how can I change my nickname now?
Will he be unlocked after 1h or 2h?
@CyBeRDuDe: Thank you verymuch for helping...
EDIT: Thank you, now I can change my nickname...