Ls777 zv8 unlock,i get test points connected,qualcomm port detected

I JUST BOUGHT MEDUSA AND ACTIVATED, I AM TRYING TO USE JTAG TO WRITE CARRIER FILES AND MODEM...WHEN I CONNECT JIG AND USB TO TO BOX AND PHONE RESPECTIVELY,I GET QUALCOMM PORT BUT AFTER I TRY TO CONNECT I GET THIS ERROR AND DEVICE WONT CONNECT...PLZ TEAM I NEED HELP:confused::confused::confused::confused:
elcome to Medusa Pro Software version 1.7.3.
Started.
Reader #0: Generic EMV Smartcard Reader 0

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG
Model : LS777
SRF : C:/Program Files (x86)/Medusa Pro Software/firmwareFolder/LG_LS777_EMMC.srf
Voltage : 1.8V
Bus Mode : 1 bit
Bus speed : Auto

Connecting...

ERROR[001]: Can not connect. No target device present.

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG
Model : LS777
SRF : C:/Program Files (x86)/Medusa Pro Software/firmwareFolder/LG_LS777_EMMC.srf
Voltage : 1.8V
Bus Mode : 1 bit
Bus speed : Auto

Connecting...

ERROR[001]: Can not connect. No target device present.

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG
Model : LS777
SRF : C:/Program Files (x86)/Medusa Pro Software/firmwareFolder/LG_LS777_EMMC.srf
Voltage : 1.8V
Bus Mode : 1 bit
Bus speed : Auto

Connecting...

ERROR[001]: Can not connect. No target device present.

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG
Model : LS777
SRF : C:/Program Files (x86)/Medusa Pro Software/firmwareFolder/LG_LS777_EMMC.srf
Voltage : 1.8V
Bus Mode : 1 bit
Bus speed : Auto

Connecting...

ERROR[001]: Can not connect. No target device present.

Please disconnect battery and USB cable.

Model Settings:
Interface : eMMC
Brand : LG