n910t Imei patch error

I am sorry for posting another problem that i got. this time am having problem patching the unlock imei patch from support. I try using my pit file but N/G here is the log

Scanning devices … 1 found
Manufactory: SAMSUNG
Model: SM-N910T
Hardware: QCOM
Mode: normal
Download: Press Vol Dn + Home + Power

UART Cable Resistor: 523 K
1. Type *#0808# and set USB to AP.
2. Set "USB Settings" to "DM+MODEM+ADB".
3. Click "OK".
Cables: MicroUSB
Interface: Auto, Change UART when request

Read Info/Flashing/UserLock/Backup:
Cables: MicroUSB
Interface: Auto

Reboot device to DOWNLOAD mode … communication failed

Wait device ready …
Connect to device …
Device pit saved to D:\Program Files (x86)\BST\backup\samsung\pit\SM-N910T\SM-N910T_2015-12-22_16.46.21.pit
Write file cache.img.ext4 …
Write file recovery.img … send data failed
Finish update process failed

Error happend while updating device
Time used : 36.2 s