i9505 5.0.1 reset msl


I have a problem. Need to repair IMEI, but when I try to repair get message that I need to reset MSL. When I try reset MSL get error:


Operation: Reset MSL
Selected model: GT-I9505
Selected port: COM496 SAMSUNG Mobile USB Serial Port
Software version: 23.9

Reading phone info...
Reading IMEI... OK
IMEI: xxxxxxxxxx
Reseting MSL security... error

Done with Samsung Tool PRO v.23.9

What I miss and where is a problem?