Flash SB6120 with Blackcat USB HELP!!!!

Hello everyone, so I'm a newbie try to flash my SB6120 DOS 3.0 modem. I did my research and read countless thread to learn and successful flashed my SB5101 to haxorware. And, now, I move on to flash the SB6120 and get stuck in this problem. So, please help me out if you know whats am I doing wrong.

So, I got all the wires connected from BCUSB to the 3M test clip following the schematic below.

  G.jpg (Size: 70.57 KB / Downloads: 18)

If I am correct, there two pin VCC and GND are power pins? VCC is positive and GND is negative? If so, what is the required voltage (3.3V or 5V) and where would I get the power source from? Does the BCUSB board supply the power directly to the chip, or we have to get the power from the modem board (positive from pin R362 connect to VCC pin, if so where should we get the negative?) OR I have to supply the power by an external power source? (If so, where should I connect the the power to?

I connect all the wires as shown in the picture, but when I plug in the BCUSB to the modem and power it up, run the software, the BCUSB is connected to my PC but it shows error message saying that error to connect to the target board which is the SB6120.

PLEASE HELP!!!!!
THANKS ALOT