help with N910T cert write

I wiped the EFS, then i try to write cert, it says MSL fail, i reset the MSL, try again, still fail. help plz?

Operation: Wipe EFS/NVM
Selected model: SM-N910T
Selected port: COM48 SAMSUNG Mobile USB Serial Port
Software version: 24.3

Warning! You will lose IMEI and Network. Continue? Yes
Waiting ADB device… OK
Reading phone info…
Model: SM-N910T
Android version: 5.0.1
Product code: Not Active
Phone version: N910TUVU1COD6
PDA version: N910TUVU1COD6
CSC version: N910TTMB1COD6
CSC country code: USA
CSC sales code: TMB
HW version:
Phone S/N:
Modem board: MDM9225M
RF cal date: NONE
IMEI:
Checking Super user right… true
Backuping MMCBLK… OK
Writing data to phone… OK
Rebooting phone… OK
Waiting ADB device… OK
Reading phone info…
Model: SM-N910T
Android version: 5.0.1
Product code: Not Active
Phone version: N910TUVU1COD6
PDA version: N910TUVU1COD6
CSC version: N910TTMB1COD6
CSC country code: USA
CSC sales code: TMB
HW version:
Phone S/N:
Modem board: MDM9225M
RF cal date: NONE
IMEI:
Checking Super user right… true
Done with Samsung Tool PRO v.24.3

then i reset MSL

Operation: Reset MSL
Selected model: SM-N910T
Selected port: COM47 SAMSUNG Mobile USB Serial Port
Software version: 24.3

Reading phone info…
Reading IMEI… OK
IMEI: 0
Reseting MSL security… OK
Reseting… OK
Reset MSL done

Done with Samsung Tool PRO v.24.3

then i try to write cert

Operation: Write CERT
Selected model: SM-N910T
Selected port: COM47 SAMSUNG Mobile USB Serial Port
Software version: 24.3

Checking certificate file… OK
KEY ID: 0772
Waiting ADB device… OK
Reading phone info…
Model: SM-N910T
Android version: 5.0.1
Product code: Not Active
Phone version: N910TUVU1COD6
PDA version: N910TUVU1COD6
CSC version: N910TTMB1COD6
CSC country code: USA
CSC sales code: TMB
HW version:
Phone S/N:
Modem board: MDM9225M
RF cal date: NONE
IMEI:
Initialization AT RIL… OK
Bypass MSL… error (2)
First reset MSL
Done with Samsung Tool PRO v.24.3