s6 eage error

Port : COM12 : Prolific USB-to-Serial Comm Port (COM12)
Baud Rate : 115200 (Auto)
Device : Samsung
Operation : Device Root Key Fix
Opening Port… OK
Checking For Phone… Error
You must use UART Connection.
Use C3303K 523k UART Cable for Connection.
Connect Cable to Phone and Box, and Restart Phone.
Phone Screen must be ON and Unlocked.
Port Closed.
Operation Failed!
Elapsed Time: 00:07
Module Ver. [1.8]
Log Saved to Logs0212_233031.log