A205F Unlock Failed

I am new here. I tried 2 times to unlock A205f but I couldn't. Please let me know where the problem is.
Here is my log. Both time same error.


Start Samsung SM-A205F UNLOCK at 5:48:17 PM
Please power on phone and connect to usb in android debug mode!
If phone ask to allow usb debuging please accept!
Searching for phone:
Searching for phone...

A205F Unlock Failed