To fix this problem you need to run the following in MySQL command line:

mysql> UPDATE mysql.user SET Password = OLD_PASSWORD('newpwd') WHERE Host = 'some_host' AND User = 'some_user';

mysql> FLUSH PRIVILEGES;

More info on this:
http://dev.mysql.com/doc/mysql/en/old-client.html

Türkay DARCAN
Aynet Bili?im Teknolojileri A.?