error 1201:change master to ... master.info.empty

[Francesco Marceca]

Good morning, i am trying to set replication process between my xp-pro server ( (192.168.1.10, mysql version:5.1.38 community-log) and my xp-pro notebook (192.168.1.53 same mysql version). The server works (i think) because when i write: show master status it says
file: mysql-bin.000012, position: 106, binlog_Do_DB: replica, 1 row is set.
On the slave i have made the backup of replica db, but when i write:
change master to master_host='192.168.1.10', master_user='root', master_port=3306, master_password='mia pass', master_log_file='mysql-bin.000012',
master_log_pos=106; it say:
ERROR 1201 <HY000>: could not inizialize master info structure and the master.info remain empty.
Can someone help me? I don't know what is the matter and why it don't work. Thanks, Francesco.