C3750 unlock problem with v17.0

[g-zona]

Have a problem unlocking GT-C3750 with version 17.0

Read info:

Selected model: C3750
Selected port: 
Selected port speed: 921600
Selected model: C3750
Selected port: COM32 SAMSUNG Mobile USB Serial Port 
Selected port speed: 921600
Searching Samsung modem... detected COM31
Reading phone info...
Model: GT-C3750
Country code: TRA
Factory SW: C3750XXKF4_OXFKG1
Unique number: 8612000077xxxx
Memory phone: K5W1G12ACP(C3750)S
Software version: C3750XXKF4/C3750OXFKG1
IMEI: 3567300412xxxx
Done with Samsung Tool v.17.0

Read Codes:

Selected model: C3750
Selected port: COM32 SAMSUNG Mobile USB Serial Port 
Selected port speed: 921600


And that's it. No message waiting for phone or something similar. Have to press cancel so stop the operation!

With version 16.9 no problem at all:

Read codes:

Selected model: C3750
Selected port: 
Selected port speed: 921600
Connect phone in flash mode
Waiting phone... OK
Sending preloader... OK
Sending loader... OK
Checking Flash ID... OK
Detected Flash ID: 003000EC
Reading security... OK
Writing security... OK
Rebooting phone... OK
If phone not powered ON - turn ON phone
Searching Samsung modem... detected COM31
Reading phone info...
Model: GT-C3750
Country code: TRA
Factory SW: C3750XXKF4_OXFKG1
Unique number: 8612000077xxxx
Memory phone: K5W1G12ACP(C3750)S
Software version: C3750XXKF4/C3750OXFKG1
IMEI: 3567300412xxxx
Bypass MSL... OK
Reading codes... OK
Please wait, calculating codes... OK (time - 00:00:23)
PCK: 00000000
NCK: 34001827
SCK: 00000000
SPCK: 00000000
MCK: 64619617
Done with Samsung Tool v.16.9