GSM-Forum - BST 3.32 (latest version) can't unlock a GM-G530T -Samsung Galaxy GRAND Prime

BST 3.32 (latest version) can't unlock a GM-G530T -Samsung Galaxy GRAND Prime

1) It's able to see the device just fine.
2) I'm running on a brand new windows 7 machine (to have no driver problems)
3) I have no "unknown devices" in my device manager (so it's not a driver issue)
4) I have the phone in the desktop and it's rooted (tried WITH AND WITHOUT ROOT)
5) I have tried the "BYPASS MSL" and the "Qualcom Direct Unlock" with no success

I SCAN for the device and it's found just fine.
But when I UNLOCK it just "communication failed"

What could be wrong?

Do you SIM/NETWORK UNLOCK a T-mobile phone to use with ANOTHER GSM carrier by simply "SCAN" the device and press "UNLOCK" correct?

please help....:(

Code:

Scanning devices ... 1 found

dev[1]

  Manufactory:    SAMSUNG

  Model:          SM-G530T

  Hardware:       QCOM

  Mode:           normal

-----------------------------------------------------

Download: Press Vol Dn + Home + Power
 

UART Cable Resistor: 523 K

ReadCodes/Unlock/Repair:

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
 

Device Authentication ... communication failed

Please check: 

  1. choose the right port

  2. some device UART need re-connect use each 30 seconds

Time used : 18.4 s

imge of my screen is at on imagur with the name Ge6Ssom