g390f not detected

[lon2g]

Hi, tried to unlock g390f by read code via sever. but alway show adb not detected. actually its cennected by z3x tool,see screen shot attatched. thanks a lots
UNLOCK INSTRUCTIONS:
Unlocking with original MSL code:
Warning! Knox warranty must be active (0x00)!
If you have it voided (0x01(void)), then you can't unlock this phone with MSL.
1. Phone must be powered on.
2. Type *#0808# and select 'DM+ACM+ADB'.
3. Run dialer and type *#0*# (service mode will appear).
4. Connect the phone to USB cable, choose correct COM port in port settings.
5. Press 'Unlock' button.
6. Paste MSL code in new opened window and press 'OK'.

Reading codes using sever:
Warning! Knox warranty must be active (0x00)!
If you have it voided (0x01(void)), then you can't unlock this phone using sever.
1. Power on the phone.
2. Type *#0808# and select 'DM+MODEM+ADB'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Press 'Read Codes via server' button, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings)

Operation: Read Codes via Server
Selected model: SM-G390F
Software version: 34.3

Checking Login and Password... OK
Ballance: 35 crd.
You have 35 credit(s) left. This operation takes 5 credits.Continue? Yes
ADB device not selected
Done with Samsung Tool PRO v.34.3